1、[4GHz]: The optical pocket pen mouse uses 4GHz wireless connection technology, with bluetooth wireless transmission, and the distance up to 397in.2、[Ergonomic Design]: The wireless mouse pen adopts the ergonomic design, effectively reduces the pressure when the button is triggered, feel comfortable and not easy to produce fatigue.3、[200mAh Lithium Battery]: The handwriting mouse built in 200 mAh large capacity rechargeable lithium battery, recyclable charging, environmental protection and convenient.4、[High Compatibility]: The stylus mouse is compatible with various devices, suitable for laptops, tablets, smart phones, for Android phones and tablets and for WIN system with Bluetooth. Do not support for IOS.5、[Optical Sensor Tracking]: The wireless mouse pen uses optical sensor tracking technology, accurate movement, high sensitivity, coherent writing, quick response and no delay. 6、[2 Modes]: The bluetooth mouse pen has two modes, can switch between desktop mode and air mode, with a middle button function, suitable for drawing CAD people.