Product introduction:10m wireless operation distance, ergonomic design, high accuracy, high quality, modern design. Ideal for game, office and home use. 1. Heavier design to control the barycenter better2. 1000/1600 dpi adjustable3. Precision, comfort and control.decent and fashionableproduct specification:button: 6wireless technology: 2.4ghzworking distance: 10mpower supply: 2aa battery (battery not include)package content: 1 2.4g wireless mouse 1 mini receivernote: if the mouse did not work after several days' or months' use,please check whether the red light flash. If so,you may need to change the batteries. If still not work,you need to again to the code as below: 1.please press the wheel key and the right button of the mouse together for more than 3 seconds. 2.then insert the receiver into the usb port(the distance between mouse and the receiver could be far than 7.88inch(20cm)). 3.code is finished.