OPEK VUM-201-BNC Dual Band Mini Mag Mount 144/440 GAIN TYPE W/BNC +COAX VHF/UHF Dual Band Mini Magnet Mobile Antenna with BNC Connector Frequency: 140-148/430-450 MHz Gain: 2.5 (VHF)/ 3.0 dB (UHF) Power Capacity: 25 Watts Length: 18.90 inches