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Description
Adder ADDERView 4 PRO Dual-Link DVI-I Video & Peripheral Switch (Four Video Heads)Control Four Computers with One Mouse Supports Four Video Heads per Channel Supports Dual Link DVI I Video Supports Resolutions up to 2560 x 1920 True Emulation Technology EDID Emulation Multiple Switching Supports USB Peripherals USB Remote Wakeup Supports Windows, Mac, Linux, UNIX, Sun Designed with the ability to support four video heads per channel, the ADDERView 4 PRO Dual Link DVI I Video & Peripheral Switch from Adder allows users to control up
- Control Four Computers with One Mouse
- Supports Four Video Heads per Channel
- Supports Dual-Link DVI-I Video
- Supports Resolutions up to 2560 x 1920
- True Emulation Technology
- EDID Emulation
- Multiple Switching
- Supports USB Peripherals
- USB Remote Wakeup
- Supports Windows, Mac, Linux, UNIX, Sun
Designed with the ability to support four video heads per channel, the ADDERView 4 PRO Dual Link DVI-I Video & Peripheral Switch from Adder allows users to control up to four computer systems and share peripherals between them using a single display, keyboard, and mouse. Dual-Link DVI-I support enables both digital and analog display compatibility at resolutions including 2560 x 1600 for medical imaging, 2048 x 1080 for 2K film post-production, or a maximum of 2560 x 1920. This version of the AV4PRO-DVI provides four total Dual Link DVI-I connectors per channel, allowing multiple video streams from each computer to be switched to four video monitors.
In addition to straight switching, the KVM, speakers, and two separate USB devices attached to AV4PRO-DVI units can either be switched in unison, as normal, or you can mix your peripherals between any of the systems to suit your current tasks. For example, you could be creating emails on one system, listening to a soundtrack from another, sending documents to a printer from a third, and performing a separate task with another USB peripheral on the fourth. The front panel on the AV4PRO-DVI helps make it easy to identify and control which peripherals should connect to each system. Additionally, USB True Emulation technology helps ensure the full characteristics of the connected keyboard and mouse are fully utilized on each system, including extra function keys, wheels, buttons, and controls that are commonly found on modern keyboards and mice.
The ADDERView 4 PRO Dual Link DVI-I Video & Peripheral Switch is well-suited for those working in architecture, graphic design, post-production, animation, banking, command & control, medical, and audio/visual industries. Supported operating systems include Windows, Mac, DOS, Linux, UNIX, BSD, Sun, NetWare, and more. Included is a 20W power adapter, a power cord, and four self-adhesive rubber feet.
General Features
- Dual-Link DVI-I with Extended Profile DDC EDID
- The AdderView 4 PRO features full Dual Link DVI-I video, delivering resolutions at 60 Hz. As the AdderView features DVI-I, you can also use a choice of digital or analog sources. The extended DDC EDID profile helps ensure that the switched graphics card is optimized to work with your screen, and the Dual-Link DVI-I capabilities further enable users to work at resolutions including 2K (2048 x 1080) for film post-production or WQXGA (2560 x 1600) for detailed medical imaging.
- True Emulation USB 2.0 Technology
- The AV4PRO-DVI features Adder's USB True Emulation technology. Emulated USB provides a rapid, reliable switching action and makes keyboard-hotkey and mouse switching possible. It also allows the use of extra function keys, wheels, buttons, and controls that are commonly found on modern keyboards and mice. Users in architecture, graphic design, post-production, animation, and more often need to use specialized interface devices, such as graphics tablets, 3D explorers, joysticks, and so on. The AV4PRO-DVI makes all this possible using Adder's True Emulation technology.
- Independent Simultaneous Device Selection
- Flexibility is key to the AdderView 4 PRO. The switch enables you to use the KVMA console to work on one computer whilst your USB peripherals are connected to other computers and your speakers are playing music from yet another. You can, of course, still switch all connected devices to any one of the connected computers as with any other KVM switch.
- Channel Selection Options
- The AdderView 4 PRO can be switched using selectable keyboard hotkeys, 3-button mice, or the front panel controls. Optionally, you can also use the RC4 remote switch to make your selection. These switching options allow you to reassign connected devices to any of the connected computers.
- Broad USB 2.0 High Speed Device Support
- A vast range of USB devices can be connected to the AdderView. From non-standard human interface devices to printers and scanners, this presents great flexibility. For example, you could be scanning a set of documents onto one computer whilst working on another and printing from yet another, all at the same time. The USB 2.0 switching action has been carefully engineered to ensure computer reliability when connecting and disconnecting USB devices.
- Options Port for Control, Synchronization, and Upgrades
- An 'Options' port enables the AV4PRO-DVI to be remotely switched using simple ASCII codes. When the channel is switched, the same ASCII codes are echoed to the 'Options' port and so, by linking 'Options' ports, two or more units can be switched in synchrony. The port enables a 4-button switch unit (RC4) to be used with the AdderView PRO. The same port can also be used to upgrade the firmware.
- USB Remote Wakeup
- USB Remote Wakeup feature is fully supported. Any connected computer can go into sleep mode and be awakened (when its channel is selected) as soon as you press a key or move the mouse. The computer and peripherals must support the USB Remote Wakeup feature.
In the Box
Adder ADDERView 4 PRO Dual-Link DVI-I Video & Peripheral Switch (Four Video Heads)
- 20W Power Adapter
- Power Cord
- 4 x Self-Adhesive Rubber Feet
- Limited 2-Year Warranty
| Hardware Compatibility | Supports PC, RS/6000, Alpha, SGI, Sun, and Apple with USB keyboard and mouse, and VGA or DVI video interfaces |
| Software Compatibility | Windows, DOS, Linux, UNIX, BSD, Sun OS, Mac OS, NetWare, and more |
| Computer Connections at Switch | 4 x USB 2.0 Type-B 4 x Dual-Link DVI-I 4 x 3.5 mm stereo jack |
| Resolution | Per head: 2450 x 1920 |
| Local KVM Console Connections | Video: 4 x Dual-Link DVI-I Keyboard/Mouse: 2 x USB 2.0 Type-A Switched USB: 2 x USB 2.0 Type-A Audio: 3.5 mm stereo jack |
| Other Connections | Options (flash upgrade, sync with other AV4PRO-DVI and RS232 triggered power switches): Modular 10P10C |
| Power | 2.5 mm DC jack (power adapter included) 100-240 VAC, 50/60 Hz input to power adapter 5 VDC 2 A output from power adapter |
| Operating Temperature | 32 to 104�F / 0 to 40�C |
| Approvals | CE, FCC |
| Dimensions | 9.2 x 4.5 x 1.7" / 233.0 x 115.0 x 44.0 mm 1 RU form factor |
| Weight | Not specified by manufacturer |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
Solid, powerful, rechargeable
Color: Black
Very impressed with its weight, speed and performance. The dial is great
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Reviewed in the United States on May 29, 2026
★★★★★ 4
Very nearly the perfect frother for all your basic frothing & mixing needs
Color: Black
There are a lot of middle-of-the-road frothers out there. I've been through a few of them in my recent search for something that could mix and froth well, without taking up any more outlets in my basement kitchen. Of the three Maestri frothers I've tried so far, this one wins the race by a nose.
Most recently, these Maestri frothers come in basically three versions: A single-speed @ 8000 RPM, a two-speed @8000/5500 RPM, and this stepless variable-speed version. Aside from that, the only real difference in recent version pack-outs is which attachments they come with.
Look over the reviews of the single-speed version and you'll find that while it can and does froth well, it starts at a single, high speed and gets there fast. This makes it pretty easy to spin liquid right out of most common cups and mugs.
There is a two-speed version, but it's harder to find, only comes in one color (Grape Purple), and while it's much better than the Maestri single-speed, it still has a couple of quirks that make this variable-speed version win out.
This mixes and froths whole milk, half-and-half, or heavy whipping cream, or just about anything else very well. Like all frothers, it takes a little time to learn its nuances and nail down the technique, this will definitely get you there.
The best feature of this is easily the speed control. Turn the knob to turn it on at a low speed that's great to get things started, then turn the knob to crank up the speed just enough to do what you need, whether that's mixing or frothing. The low starting speed makes it easy to keep things under control without undue spilling, and the max speed is more than enough to make quick work of getting your froth on.
There are really only two complaints I have with this stepless, variable speed version:
- I'd really like to have a Press On / Release Off button in addition to the Speed Control knob. More than one time have I gone to turn this off, only to spin the knob the wrong way and crank the speed up to ludicrous, sloshing liquid on the counter. Being able to turn it Off just by letting go of the button would be quick and easy. This configuration would allow using a preferred speed right from the start, while still allowing speed to be adjusted on-the-fly when needed.
- Give it a bigger battery. It would cost mere pennies to give this a 2000mAH+ instead of a 1200mAH battery, and I can't think of any reasonable downside to that.
- Give the motor a little more torque. It's fairly easy for the current motor, at any speed, to get bogged down in a thick protein powder mix, or when pressing the frother or other attachment a bit too hard into the bottom or side of the frothing container. A bit more "oomph" would prevent that.
I really like the overall design and features of thes Maestri frothers better than many other, cheaper versions. This variable-speed version is pretty great as it is and probably the one I would recommend over the single- or two-speed, for most people. But I often find myself using two hands -- one to hold it steady, and the other to turn it on and tweak the knob to the desired speed(s) -- for a device that should arguably need only one hand to use. Just a couple of minor tweaks as noted above would make this the overall best frother of its type that I've used.
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Reviewed in the United States on May 23, 2025
★★★★★ 5
Hands down, the BEST handheld frother I've ever used!
Color: Black
Hands down, the BEST handheld frother I've ever used! I got the black one, but any color will have the same results.
Over the past 12 years or so, I've used so many different handheld frothers and they've ALL fallen short of expectations for quality, longevity, power, features, and usability.
I've used everything from cheap, $15 models to $50+ models and everything in-between. Some with fancy attachments for various types of mixing, frothing, beating, whipping, etc. Some with rechargeable batteries, some without. Some AC powered, some with fixed whisks, some with detachable/replaceable whisks, some with stands, etc. NONE have been spectacular. Most broke within 6 months and got tossed. ALL were major disappointments in the end, including the "revered" Zulay models of which I tried several.
I finally found this Maestri House branded, variable speed frother with detachable / replaceable whisks and got one to try. I was literally on Cloud Nine the first time I turned it on. Like, WOW! Not only was it FAST on the highest speed, but it was powerful enough to churn right through milk, eggs, cream, etc, without bogging down like many others.
This thing makes milk froth like a milkshake and Matcha Lattes like nothing else I've ever experienced. I used to have to sift my Matcha, then whisk it in hot water, then froth milk and then blend them together to make the perfect latte. and if the milk was cold (my preference), pre-whisking in hot water was a must to avoid lumps. However, with THIS frother? I literally pour my milk into a tall tumbler, drop in un-sifted Matcha powder, and spin up the Maestri House frother at first on a medium low speed to get it mixed, then jump straight to the highest speed to really whip that milk and match up. After about 30-45 seconds, I've got the thickest, richest, smoothest, most aerated latte around. And NO LUMPS at all!!! What a time and dish saver!
And cleaning? I just run it under hot running water to get the shaft cleaned and then spin it up in a dish with hot running water for a few moments, then spin it on high for a few seconds in the air to dry it off instantly.
Now, I'll be honest here, too. The specs say it can go months on a charge, using it for a couple minutes a couple times daily. Well, I guess it could do that and still spin. But I use it FULL SPEED, churning hard for at least a minute a couple times per day. After about 2 weeks, I can start to notice a speed reduction so I just plug it back in on the charger. All things considered, this is still better than all the other handheld frothers I've used over the years.
After using the heck out of this thing for the past 7 months, I've even decided to start selling these in our Japanese gift shop. The manufacturer is has been very responsive both in customer support (I called them about an issue I thought I was having, and they called me back with a couple hours even though I didn't leave voicemail when they didn't answer right away) and in reseller support. I have to give these guys an A+ for responsiveness and quick resolution when problems might arise.
HIGHLY recommended!!
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Reviewed in the United States on October 17, 2025
★★★★★ 5
Great Addition!
Color: Black
Why did you pick this product vs others?:
I just started a powdered drink routine recently and was having a difficult time mixing it with water. I would consistently end up with small nuggets of mix making it unenjoyable to drink. I knew I needed a mixer and was glad I found this device when I did. It works perfectly! I like the fact that it comes with its own stand and included two mixing heads. It is solid, well-designed, and you can feel the quality when you pick it up. The variable speed of the mixer is perfect for ensuring that everything is blended well. I haven’t used it to “froth” anything yet, at least not on purpose, but I accidentally found out that it can do that well. This is a great addition to our kitchen and is very easy to wash after use. So far…no issues. Highly recommend for those of you looking for the right tool to make sure those protein mixes aren’t full of unmixed nuggets.
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Reviewed in the United States on June 21, 2025
★★★★★ 4
Low foam
Color: Black
Love this frother. It is great quality and the turn speed is amazing. My only issue is this. It comes w 2 wands and they are both singles. The single is great for stirring things up. It does not make a lot of froth and for some things it’s perfect but sometimes I like a lot of froth and I wish it either came w a single and a double or you could purchase a double separately to intermix. I don’t want to buy a whole other unit just for the double. I wrote to them bc the double frother they sell doesn’t look as good as this one but sometimes a girl needs a lot of foam and sometimes th stirring is perfect.
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Reviewed in the United States on February 20, 2026
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