This cordless mouse lights up when in use and conveniently stores the transmitter inside the mouse. Ingenious storage of receiver 800 DPI auto shut off for energy saving rubberised finish uses 2 x AA batteries (included) Unit Size 8.6 x 5 x 3.1cm. Product size: 97mm x 55mm x 28mm. Packaging: Sitting in a black foam insert and presented in a deluxe black 2 part gift box in a white sleeve.