Left Handed Small Vertical Mouse: Compact small lefty vertical mouse with natural handshake design, fit for human hand structure. Concave area for thumb and little extended bottom edge for pinky finger, smoother moving and more comfortable grip, reducing hand fatigue caused by long-term use of traditional mouse, releasing the pressure Built-in Rechargeable 500mAh Polymer Li-ion Battery: At two hours power fully charge, stable use for a week (8 hours/day); With auto energy-saving sleep mode, normally it could last for a month Multi-devices connection: It supports BT and 2.4G wireless connection (USB nano receiver stored in the mouse bottom), easy shift between BT and 2.4G mode, adapting different using condition Five Adjustable DPI: 800/1200/1600/2400/4000 five shift DPI via the DPI button located above the backward button, easy to adjust Wide Compatibility: Compatible with Windows 7/8/10/Mac OS, fit for different devices, PC, Laptop, Computer, Notebook, Phone, Macbook. Note: It