® 200-Watt Pretuned 410 Mhz to 490 Mhz Black-Nut-Type Quarter-Wave Antenna with NMO Mounting. Frequency: 410 MHz to 490 MHz. Amplify your signal with the tram 410mhz-490mhz pre-tuned antenna. This antenna features unity gain, no tuning and 1/4 wave.