Adopting reliable 2.4GHz wireless technology, this mouse can achieve quick connection and wireless transmission effective distance about 8 to 10 meters. What this mouse can offer you is handwriting input design, so it can be applied on a narrow desktop and allow you to use comfortably while in different sitting gesture. Humanized button position design makes you grasp conveniently. Made of premium ABS material, it is lightweight and durable to use. The length of the product is 14cm, the width is 2cm, and the height is 1.5cm. It is compatible for Windows 7/8/10/Vista/XP/2000, for Android, for Linux, for Mac OS. One AAA battery can support usage time for about 1-3 months. It has automatic power off function when no signal, which is more power saving. With small base, it does not occupy much space. Item Name: Wireless Mouse Pen Material: ABS Number Of Keys: 4 Wireless Carrier Frequency: 2402MHz-2480MHz Wireless Working Channel: 16, Automatic Frequency Hopping Rated Operating Voltage: 3V Rated Operating Current: 15mA Tracking System: Optics Speed: 14 Inches Per Second Wireless Type: 2.4G Transmission Distance: 10 Meters 3 Speed DPI Adjustment: 800/1200/1600 Supported Systems: for Windows 7/8/10/Vista/XP/2000, for Android, for Linux, for Mac OS Battery: 1 x AAA Battery(Not Included) Features: High Precision, DPI Adjustable, High Sensitivity Size Details: 14cm x 2cm x 1.5cm/5.51" x 0.79" x 0.59" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Wireless Mouse Pen 1 x Receiver 2 x Adapter