The Targus Wireless Optical Stow-N-Go Laptop Mouse features a stow-and-go USB receiver that attaches securely to the bottom of the mouse for added portability and convenience. The receiver also triggers an On/Off switch to help conserve power when the mouse is not in use, for up to 6 months** of battery life. The built-in low power indicator light lets the user know when to change the two AA batteries. The integrated tilt wheel* provides 4-way scrolling for easy navigation by enabling users to scroll vertically and horizontally. This mouse offers RF technology coupled with switchable 1,600/1,200/800 dpi resolution allowing for adjustable cursor speeds.