Fangrui Product Details 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: Rf 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 Mit/receive Ing 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:black/grey Material:aluminum Alloy Package Contents: 1 * Cb-27 Amplifier Only The A Easy To Clean And Maintain