Please read before buying!!!-Battery Bluetooth Mouse （Mouse is connected via bluetooth, No USB Receiver. Battery is not included ）-Support smart mobile phones and tablets with BT function.-For ipad system requires for ios13 or above. Bluetooth is only available for Windows system win10 version and above. Feature:1: DIP switch,DIP Three Gears/Rapid Positioning/Precise Tracking2: Ergonomic shape,Long-term use will not cause exhaustion3: Mute Botton,the sound produced can be reduced by about 95% compored with other mice, and the button life is up to 5 million times.4: Widely compatible,Support all major brands of mobile phones,tablets,laptops,all-in-ones, smart TVs, Apple, Samsung,OPPO,VIVO, Huawei Xiaomietc.on the market. Specification:Working mode:Bluetooth-compatibleNumber of keys: 4DPI: Switch life: 10 Million timesProduct material: ABSProduct size: 115*60*26mmPower supply mode: 2 AAA batteries (not included) Package:1 x Mouse Note:This mouse only support bluetooth connect,and need to installed Battery（Battery is not included ）