Specification: Button number:6 buttons Tracking System: optical Connection Mode: 2.4G USB Effective distance: 10m Working voltage/current: 3V/4mA Size: 4.33 * 2.83 * 2.95 (in) Item weight: 100g DPI Levels: 1000-1600-2400 Polling Rate: 250Hz System requirements Windows2000/ME/XP(x64)/Vista/7/8/10/Mac OS X(over V10.4)/Linux.(The Forward-Back thumb buttons are not recognized on the Mac OS X.) An available USB port Package includes: Mouse x1 USB Receiver x1 Instructions x1(The USB receiver is inserted in the battery compartment of the mouse) (1 AA battery required but not included) What to do if the mouse has no response? 1.According to the positive and negative sign, please install it in the battery box correctly. 2.Please try to replace the receiver with an USB interface. 3.Make sure the power switch at the bottom of the mouse is “on”position. 4.Try to restart the computer. 5.Press the left?middle?right key when the power is on, and put the receiver into the computer, waiting for 5 seconds, and then you could rematch code successfully. 6.If it is still unsuccessful, please contact us for technical assistance. Note: When matching code, please make sure that the power switch has been turned on and the distance between the mouse and receiver is limited in 30CM.

Warranty & Support: Follow the platform's return policy, we provide the full technical support after selling and any questions about the product, feel freely to contact us. Kindly Note: The USB receiver is inserted in the battery compartment of the mouse; 1 AA battery required but not included.No lights on both sides of the mouse,just blue decorative strips.Please peel off the transparent protective film on the bottom of the mouse before use.This is a right-handed mouse. Widely Compatible with Windows 2000/ME/XP(x64)/Vista/7/8/10/Mac OS X(over V10.4)/Linux.(The Forward-Back thumb buttons are not recognized on the Mac OS X). Added Forward-Back buttons (Only Used for Windows)provide convenience when webpage browsing; the superior choice for internet surfers, gamers and people who work at length at the computer. Ergonomic Vertical Design.Unlike those traditional ones which strain wrist and arm over time, causing great pain. The vertical design provides better support for your forearm minimizing wrist pain that can come from twisting.