Features: brand new and high quality This power amplifier can output 39.2dBm (8.31W) 433MHz at 8V, the current is 1.56A, and the efficiency is 66.5%. The development team made in-depth matching and optimization of this power tube, as far as possible to achieve the original manual data. Comparison test is welcome. Operating frequency: 400-460MHz Maximum output power (P1dB): 8.32W (39.2dBm) 8V 1.56A Efficiency 66.6%; 6.76W (38.3dBm)@7V 1.43A Efficiency 67.5%; 5.12W (37.1dBm)@6V 1.26A Efficiency 67.7% High power, high efficiency, small size,with cooling heatsink for better performance. Specifications: Input Power: 20~23dbm (0.1~0.2w), It Can Work Below 0.1w, Working Voltage: 5-8.4V (Typical Lithium Battery Supply Voltage) Working Current: 1.6A (max) Input Impedance: 50 Ohms Output Impedance: 50 Ohms Input And Output Terminal: SMA-K Female (External Thread Inner Hole) Module Size: approx 4x5.5cm/1.57x2.16in (excluding Protrusions) Module Weight: 58g 8v Power Supply, Output 39.2dbm (8.3w), Efficiency 66.6%, Package Includes: 1 PC x 433MHz 8W Power Amplifier Board note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.