Function [2,4 GHz] The optical pocket pen mouse uses 2,4 GHz wireless connection technology with Bluetooth wireless transmission and a distance of up to 393,7 inches. [Ergonomic design] The wireless mouse pen adopts ergonomic shape, effectively reduces pressure when the button is activated, feels comfortable and is not easy to produce fatigue. [200 mAh lithium battery] Handwriting mouse built into high capacity 200mAh lithium battery, recyclable charging, environmental protection and convenience. [High compatibility] The stylus mouse is compatible with a variety of devices, suitable for laptops, tablets, smartphones, android phones and tablets, and WIN system with Bluetooth. It does not support IOS. [Optical Sensor Tracking] Wireless mouse pen uses optical sensor tracking technology, accurate movement, high sensitivity, consistent typing, fast response and no delay. [2 modes] bluetooth mouse pen has two modes, it can switch between desktop mode and air mode, with middle button function, suitable for drawing CAD people. Specification: Item Type: Mouse Pen Material: ABS Color: Grey DPI: 1200 Number of buttons: 4 Wireless carrier frequency: 2402MHz-2480MHz Wireless working channels: 16, automatic frequency skipping Rated operating voltage: 3 V Tracking Systems: Optics Rated operating current: 15mA Maximum acceleration: 14 inches per second Battery Type: Lithium Battery Battery capacity: 200 mAh (included) List of packages: 1 x mouse pen 1 x USB cable Receiver 1x2.4G 1 x User Manual