Model: JP-16AP Color: Black Wireless technology: RF 2.400GHz~2.483GHz Working distance: 10m Built-in red laser pointer (Wavelength: 650nm) Max output power: 1mW Working voltage: 1.5V Battery: 1 x AAA battery Power Consumption: 30mA Working time: 5h USB port: USB2.0/1.1 Plug and play System requirements: Microsoft? Windows?2000/XP/Vista Package included: 1 x Presenter 1 x Receiver 1 x AAA battery 1 x English & Chinese Manual Presenter dimensions: 10.5 x 4 x 2cm, weight: 24g Package dimensions: 13.2 x 7.2 x 4.2cm, weight: 90g