Each unit is guaranteed fully operational. Amplifiers have been tested at both 144.000 Mhz and 155.000 Mhz, in both cases the unit puts out 80 watts (See Screen Shots).Operating Voltage: 13.8 VDC. Dimensions: D 6 x W 19 x H 7. The item "Crescend VHF Power Amplifier, 144-162 Mhz 25 Watts Input = 80 Watts Output HAM" is in sale since Thursday, July 27, 2017. This item is in the category "Business & Industrial\Facility Maintenance & Safety\Surveillance & Alarm Equipment\Two-Way Radios". The seller is "erac1" and is located in Lakewood, CO. This item can be shipped to United States, Canada.