This transmitter is designed for mobile or base CW operation. Powered by the 12 volt vehicle battery or 12 volt regulated power supply, the maximum power output is less than 5 watts RMS. Frequency of operation is within the 10 meter band, determined by installation of a crystal into the oscillator board. The transmitters contain a transmit/receive relay and an output connector for the receiver to share the antenna and permit break-in operation.Frequency Range = 28.0 MHz to 29.7 MHzStability = 50 parts per million, 0-50 degrees Celsius with typical quartz crystalPower Output = < 5 wattsVoltage = 13.6 volts DCAmps = < 4Impedance = 50 ohmsDuty Cycle = 100% at full outputHarmonics = > 30dB downDimensions = 3-1/4"(H) x 5-1/4"(W) x 8"(D)Weight = 3-1/2 pounds