These Are Black and White Xiaomi Wireless Mouse Lite 2 Units.

Wireless Connectivity: Operates via a 2.4GHz wireless connection using an included USB nano receiver.Design & Weight: Features a minimalist, streamlined aesthetic weighing 45g (without battery) with a 1000 DPI sensor for everyday use.Power & Features: Powered by a single AAA battery, it includes an auto-sleep mode for energy saving and is designed for quiet operation.