Features: Support special Union model:M185 (Union version)/M185 (Union version)/M215 (Union board)/M238 (Union version)/M305 (Union version)/M275 (non-black with blue background). Special ULink models are not supported: M545/M546/M570/M705. How to use the USB receiver? When you receive a new receiver, you must pair the new receiver with the mouse.
Specifications: Connect : wireless Interface: USB Wireless transmission frequency: 2.4GHz Whether to support ergonomics: support Size: approx. 18.4x14.4x6.6mm/7.24x5.67x2.60in
Package Includes: 1PC x USB Receiver
note: Only supports keyboard with Unifying icon union technology. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!