1.Wireless Mouse: The laptop mouse wireless with USB Nano receiver (stored within the back of the mouse) . usb mouse wireless no drivers need to be installed, plug & play, effective up to 10 meters of range(33 ft) 2.Silent Mouse: Computer mouse wireless smooth surface and quiet clicks can bring a better user experience and your worry about bothering others and keep you stay focused while working 3.Energy Saving: This mouse for laptop will automatically sleep after 8 minutes of inactivity for energy saving, and it can be woken up by clicking any button, 1 AA battery needed (not included in the package) 4.Slim : The mouse for laptop about 4.3 x 2.3 x 0.9 inch; 0.23lb, Perfect for travelling carry and it can be easily put into your laptop bag and ultra-space saving. Small mouse with 5 adjustable DPI levels (800/1200/1600/2000/2400), you can ly choose your cursor speed