Product description Tx frequency: 144 ~ 160 mhz Tx frequency: 161 ~ 174 mhz Tx frequency: 420 ~ 450 mhz Tx frequency: 451 ~ 480 mhz Jamming range: radius up to 30m Total output power: 20 w Rf output power each band: 5 w Cover interface standards: vhf 144 ~ 174 mhz, uhf 420 ~ 480 mhz Automatic power switching power supply: 50/60hz/ac 100 ~ 240v transmitting to dc 24v Dimension: 238 ã? 186 ã? 53 mm Weight: 1.6 kg Operating temperature: -10c ~ +60c Humidity: 5% ~ 80% Safety regulation: ac adapter ul (e190582), csa (lr112971 level 3) Accessories: Power adaptor Antennas User manual