Sennheiser AD 3700, Active Broadband Directional Antenna, With integrated antenna amplifier AB 3700, Frequency range: 470 - 866 MHz, Impedance: 50 Ohm, RF connector: BNC, Mounting connection: 3/8"" and 5/8"" stand threads, Dimensions: 329 x 322 x 24 mm, Weight: 625 g, Colour: Black