Features: Ergonomic Design: This pen-shaped mouse solves the fatigue and discomfort caused by ordinary mouse. Fits comfortably in the hand, left and right mouse buttons are in clear placements for easy clicks, effectively relieve pressure on carpal tunnel area, ensuring smoother movement and less overall strain for wrist and arm positions. DPI Adjustable: Three resolution adjustable 800/1200/1600DPI, providing more smooth and precise tracking on a wide surface than standard optical mice. The default setting is 1200DPI. You can choose your favor DPI through this function. High-technology and Long Effective Distance: 2.4GHz cordless technology, ensuring strong signal and smooth operation, up to 10 meters/33ft operating distance, meeting your daily needs. You can control your computer on the bed or sofa as you like. The mouse is powered by 1 AAA ba-ttery(Not Include), comes with a USB receiver, plug and play, no other driver needed. Wide Application: Except usual mouse buttons (Left/Right/Scroll wheel/DPI), the optical pen mouse are also perfect for handwriting input and graphics design. Can be used as PPT presenter when needed(use mouse wheel to turn pages freely), such as speech, meeting, assisting multimedia teaching and other occasions. Compact and Lightweight: 5.5*0.8*0.6in mini size, perfectly fits in your pocket, portable for you to use it in a limited space and carry anywhere you want. You can use a cordless mouse anywhere you like. High Compatibility: This pen mouse is compatible with various software and devices. It supports Windows7/ 8/ Vista/ XP/ 2000, Android, Linux, MacOS and more. Fit for Desktop, PC computer, Laptop and mobile phone.