The future of rally navigation is here - Roamerlite-C is the first cordless poti and provides complete freedom of use. Powered by 3xAA batteries and with 10-12 hours continuous use on full brightness. All of the great features from the Romerlite-B have been carried over including the lightweight ergonomic design and natural light frequency LED technology with diffuser ring to provide 100% light across entire viewing area without dazzling the driver. Cordless operation No special batteries required (AA) Low battery indicator Dimmer control Adjustable strap / handle Low current draw with zero heat build up.