Features: 1.Adjustable DPI: DPI can be adjusted in three levels. 2.Large battery capacity, short charging time and long using time. 3.Designed for left-handers, solve the troubles of left-hander. 4.More than 5 million mouse clicks, durable and practical. 5.Ergonomic vertical mouse, and it is suitable for the natural position of palm and wrist muscle, and it helps to reduce the pain and pressure that caused by mouse. specification:Feature: Adjustable DPI: DPI can be adjusted in three levels. Large battery capacity, short charging time and long using time. The blue light turn on when charging and off when full. No installation is required, the mouse power switch is turned on when the receiver is plugged into the USB port of the computer, and you can use it under charging. Slip-resistant and sweat-resistant, soft and comfortable to use. Ergonomic vertical mouse, and it is suitable for the natural position of palm and wrist muscle, and it helps to reduce the pain and pressure that caused by mouse. Designed for left-handers, solve the troubles of left-hander. More than 5 million mouse clicks, durable and practical. Supported system: For Windows 2000 / ME / XP / 7 / 8/10 / Vista / 98 / Mac OS / Linux, etc. : Model: The fifth generation of charging left hand Type: Optical Mouse Mouse size: Big rat (120mm) Computer connection method: Wireless Applicable models: Laptop Photoelectric resolution: 2000dpi Whether to support ergonomics: Support Adjustable resolution: Three levels Interface: USB Battery capacity: 400mAh (built-in) Charging time: about 3 hours Using time: 7 to 15 days (depend on the using amount) Color: Black Package List: 1 * Wireless Mouse 1 * USB Cable 1 * Instruction Manual 1 * USB Receiver