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. Specification:Model: The fifth generation of charging left handType: Optical MouseMouse size: Big rat (120mm)Computer connection method: WirelessApplicable models: LaptopPhotoelectric resolution: 2000dpiWhether to support ergonomics: SupportAdjustable resolution: Three levelsInterface: USBBattery capacity: 400mAh (built-in)Charging time: about 3 hoursUsing time: 7 to 15 days (depend on the using amount)Color: Black Package List:1 * Wireless Mouse1 * USB Cable1 * Instruction Manual1 * USB Receiver 1Adjustable DPI: DPI can be adjusted in three levels. 2Large battery capacity, short charging time and long using time. 3Designed for left-handers, solve the troubles of left-hander. 4More than 5 million mouse clicks, durable and practical. 5Ergonomic 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.