Features: 1) RF mini wireless optical mouse with mini USB receiver 2) Radio frequency and optical technology 3) Adopts optical orientation technology, high accuracy and reliability 4) Dispensed with mechanical parts and trackball 5) Dispensed with mouse pad and reflector board 6) Super long working life 7) Freely 360-degree use within 1.5m radius 8) One channel 256 IDs, no interference even in case of multiple users 9) When the mouse is recharging, you can use it as  a wired mouse. It's very convenient to use it , you are never worried about the problem of " NO POWER" 10)Size: 93x 50 x 32.5mm 10) Weight: 100g Packing: white box.