Ultra Slim/Small 2.4GHz Adjustable Wireless Mouse Mice + USB 2.0 Receiver for Laptops/Desktop PC XP/Vista/Windows 7 (Green) Advanced Power management system, you can adjust the distance and rate and it also can set power off situation. you can use the left, right, and mid key to start. Low-voltage alarming function, Low power consumption 16 wireless working channels, automatic frequency jumping The dongle can be stored inside the mouse when not in use. and it no need driver plug and play,with On/Off power switch Fit for home, office use. Ideal for PC and Laptop use