logitech wireless presenter r400, usb

Basic information: RED LASER DISPLAY DOWN OF 15 METERS (2.4 GHz Wireless Technology) PLUG-AND-PLAY (USB) WIRELESS RECEIVER BATTERY STATUS INDICATOR INTUITIVE CONTROLS OF PRESENTATION Technical parameters: Dimensions: 16.5 mm x 58.6 mm x 7.9 mm Receiver weight: 6 g Black colour Laser class: Class 2 laser product Maximum output power: Less than 1 mW Wavelength: 640-660 nm (red light) Battery type: 2 AAA batteries Battery life (laser pointer): 20 hours max Battery life (presentation