Frequency: 25-30MHz Input Power: 1-5W (no over-power protection) Output Power: 120-160W Amplification Circuit: Class AB Harmonic Suppression: -40dB Description: PA150W is specifically designed to provide power amplification for low-power CB radios, effectively increasing power output while keeping costs low. It uses commonly available MOSFETs. We welcome its use under safe and proper conditions! Drive Method: Triggered (carrier triggered) Input Voltage: 12-14.5V/DC Typical Operating Voltage: 13.8V/DC Input Current: Not less than 22A Operating Modes: SSB/FM, AM, CW Transmit/Receive Switching Time: about 15ms Input SWR (Standing Wave Ratio): less than equal 1.5 Output SWR: less than equal 1.8 (typical value 1.5; damage risk increases if exceeding 1.8) Over-Current/Over-Voltage Protection: None Input/Output Impedance: 50 Ohms Theoretical Communication Range: 3KM-5KM Main Unit Dimensions: 16cm x 21cm x 9cm Net Weight: 1.5kg Colour:Grey Material:aluminum alloy Package Contents: 1 * CB-27 amplifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.