A 55mm removable trackball, dual-sensor tracking and a ring-shaped scroll control set the Kensington Expert Mouse Pro TB900 EQ apart from a regular desktop mouse. The device supports wired USB-C, 2.4GHz wireless and Bluetooth connections, with the ability to connect to four devices at once.
The TB900 EQ has an ambidextrous design for left- and right-handed users. It is made for medium to large hands and stays in one place while users move the ball to control the cursor.
The 55mm trackball sits at the centre of the device. Kensington’s DIAMONDEYE dual-sensor technology tracks its movement for cursor control. Users can remove the ball for cleaning, while four sensitivity levels offer different cursor speeds: 400, 800, 1,200 and 1,600 DPI.
A scroll ring surrounds the trackball and supports adjustable scrolling. It can help users move through long documents, spreadsheets and editing timelines. The mouse has two customisable side scroll wheels for horizontal navigation and zooming.
Its programmable buttons can be configured through Kensington Konnect software. The software supports up to 16 programmable button sets, allowing users to assign shortcuts for different tasks and applications.
The TB900 EQ supports USB-C wired, 2.4GHz wireless and Bluetooth connections. It can connect to four devices at once: two through Bluetooth, one through the wireless receiver and one through USB-C. Users can switch between connected devices without pairing them again.
The 2.4GHz connection supports 128-bit AES encryption. Kensington lists a polling rate of up to 1,000Hz over USB-C and 2.4GHz, although this rate is not available through Bluetooth.

The rechargeable battery is rated for up to four months on a single charge. Actual battery life will depend on usage. The included USB-C cable supports charging and wired operation, allowing users to continue working while the mouse charges.
The TB900 EQ supports Windows 10 and newer versions, as well as macOS 14 and newer versions. Kensington Konnect provides button customisation and control settings. Registered users can access Avid Pro Tools Intro+.
The mouse measures 124 x 61 x 163mm and comes with a three-year limited warranty. Its large trackball and several physical controls make it a desktop-focused option for users who prefer finger-controlled cursor movement.

The Kensington Expert Mouse Pro TB900 EQ is available in China for 999 yuan (Approx $150) through the company’s JD.com store. The listing shows more than 5,000 reviews and a positive rating above 96%. Kensington has not confirmed pricing or availability in India.
Source: JD.com



