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 470 M Hz by cutting the whip using the simple chart to obtain your chosen spot frequency. Designed for commercial amateur & hobbyists. Main uses include Police Ambulance Fire service PMR Taxi VHF Aircraft Marine scanner enthusiasts & much more