The Mirage Dual Band Handheld Amplifier, which includes the 144/440 MHz segments. At 1-7 watts in, it will put out 45/35 watts respectively. It is also capable of full duplex operation, allowing the user to transmit on one band and listen on the other - provided that the handheld you're using is capable of this function. Listed frequency ranges are 144-146 on 2 meters and 430-450 on 70 centimeters. It is described as having an automatic band select, on-air indicator, and reverse polarity protection.