UGREEN M785DR Wireless Trackball Mouse: Specs, Features, Pros & Cons
The number that matters most here is the sensor ceiling. On a 1080p screen it is fine; on a large 1440p or 4K panel it means noticeably more thumb work to cross the screen. If you are shopping for a trackball because you sit in front of a big high-resolution display, check that figure against what you are used to first.
Everything else reads like a well-equipped office device — eight buttons, a tilting wheel, three-device switching and USB-C charging.
Category strengths
Where the UGREEN M785DR Wireless Trackball Mouse beats the average
- Has horizontal scrolling ?
- Has USB-C charging ?
- More buttons ?8 vs 7.59 (avg)
- Has software customisation ?
Where the UGREEN M785DR Wireless Trackball Mouse trails the average
- A much lower max sensitivity ?2,000 DPI vs 20,827.14 DPI (avg)
- A much heavier build ?155 g vs 91.95 g (avg)
- Much shorter battery life ?287 h vs 1,490.11 h (avg)
- No adjustable lift-off distance ?
- No RGB lighting ?
- No wireless charging ?
- No adjustable weights ?
- A slightly smaller battery ?500 mAh vs 507.14 mAh (avg)
Editor’s note
The number that matters most here is 2000 DPI. That is the ceiling, and on a 1080p screen it is fine – on a 27-inch 1440p or a 4K panel it means noticeably more thumb work to cross the screen. If you are shopping for a trackball because you sit in front of a large, high-resolution display, check that figure against what you are used to before ordering. It is the one specification on this mouse you cannot work around.
Everything else reads like a well-equipped office device. It is a thumb-operated ball on a vertical, right-handed body, with eight buttons, a scroll wheel that tilts for horizontal scrolling and has a speed-switch mode, and five DPI steps. Connectivity is Bluetooth or the bundled 2.4GHz receiver, up to three paired devices with one-button switching, and UGREEN lists Windows, macOS, Linux, ChromeOS, Android and iPadOS support. The 500mAh battery charges over USB-C, and the receiver stores inside the mouse, which is the sort of small detail that stops it getting lost in a drawer.
The real question with any trackball is not the spec sheet, it is whether you will stick with it. The whole appeal is that the device never moves – useful on a cramped desk, and it takes forearm travel out of the equation – but there is an adjustment period, and the shape is right-handed only. UGREEN also publishes no sensor model, polling rate or click latency, so if you want to compare responsiveness against a gaming mouse there is simply nothing here to compare. Treat it as a productivity device and that gap stops mattering.
For office and document work at 1080p, on a small desk, this is a lot of hardware for the money. Go in knowing the DPI ceiling, and knowing you are committing to learning a different input method.
Specifications
Quality bars are generated automatically against 69 other mice.
Sensor & tracking
A higher maximum DPI moves the cursor further per inch of movement.
How fast you can move the mouse before it stops tracking accurately.
The acceleration the sensor handles without losing tracking.
The optical sensor model (e.g. PixArt PAW3395).
How often the mouse reports its position; higher feels more responsive.
Tune the height at which the sensor stops tracking.
Design & handling
Lighter mice are easier to flick and less tiring; lower is better for most players.
The overall length of the mouse.
The overall width of the mouse.
The overall height of the mouse.
More programmable buttons add functionality.
The grip styles the shape suits.
Which hands the shape supports.
The material of the glide feet (e.g. PTFE).
The physical pointing-device style.
A tilt wheel or dedicated thumb wheel scrolls horizontally.
The wheel can switch to a low-friction mode for rapidly scrolling long documents.
Switches & latency
The delay from pressing a button to the computer receiving it; lower is better.
The main-button switch technology or model.
The manufacturer-rated click durability.
Lets you tune debounce time to balance speed and double-click protection.
Connectivity
The supported connection types.
The maximum wireless report rate.
The cable type (e.g. flexible paracord USB-C).
Charges over the modern reversible USB-C connector.
Battery
How long the mouse lasts on a charge (wireless).
The rated capacity of the mouse battery.
Whether the mouse uses a replaceable cell or an internal rechargeable battery.
A short charge gives hours of use.
Recharges on a compatible pad or mat.
Features
Stores profiles on the mouse to use without software.
Companion software for remapping buttons and DPI.
Tune the balance with removable weights.
Customisable RGB lighting.
Specs last verified August 21, 202621 of 34 specs verified (62%)Unverified specs show as Unknown — never estimated, never scored
Price history
Mice with similar specs to the UGREEN M785DR Wireless Trackball Mouse
Ratings & reviews
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The bottom line
The UGREEN M785DR Wireless Trackball Mouse earns a VS Score of 31, trailing most of the 70 mice we compare here, at least on the spec sheet.
- Who it’s for
- People short on desk space, or who want to stop moving their forearm to move the cursor, working mostly in documents and browsers at 1080p. Eight remappable buttons and three-device switching is generous at this price.
- Who should look elsewhere
- Left-handers – the body is right-handed only. Also not for gamers, or for anyone on a 1440p or 4K display who needs to cross the screen quickly, because 2000 DPI is the ceiling and there is no higher step.
- The trade-off that matters
- A lot of hardware for the money – eight buttons, 4D scroll, three-device Bluetooth and 2.4GHz, USB-C charging – against a low 2000 DPI ceiling, a right-handed-only shape, and no published sensor, polling rate or latency figures.
- The main alternative
- Kensington SlimBlade Pro Trackball, if the thumb ball does not appeal. It uses a large finger-and-palm-operated ball rather than a thumb one, works for either hand, and costs considerably more – a different way of working rather than a better version of the same one.
The VS Score is calculated from the weighted specifications above, measured against every other mice we track — a shortlisting guide, not a substitute for your own priorities. See how we score.
