Transmit frequency 138 470 MHz Length 55cm Power 50W Base 30mm Magnetic Cable 4 metres of mini RG174 cable Connection BNC with PL259 Adapter This brilliant micro antenna comes complete with a tiny magnetic base 4 metres of mini coax terminated with a BNC. Transmit anywhere between 138 to 470MHz by cutting the whip using the simple chart to obtain your chosen spot frequency. Designed for commercial amateur and hobbyists. Main uses include Police Ambulance Fire service PMR Taxi VHF Aircraft Marine scanner enthusiasts and much more