Fangrui Product Details This Power Amplifier Can Output 39.2dbm (8.31w) @ 433mhz Maximum At 8v, Current 1.56a, Efficiency 66., Which Is Very Suitable For Two Lithium-ion Batteries And Can Burst Such A Large Power. High Power, High Efficiency, Small Size, Power At 8v, Output 8.3w. Working Frequency: 400-460mhz. Maximum Output Power (p1db): 8.32w (39.2dbm) @ 8v 1.56a Efficiency 66. 6.76w (38.3dbm) @ 7v 1.43a Efficiency 67. 5.12w (37.1dbm) @ 6v 1.26a Efficiency 67. Input Power: 20 - 23dbm (0.1 - 0.2w), Less Than 0.1w Can Work, The Output Power Will Increase As The Input Power Increases, And Finally Reach The Maximum Power Point. Working Voltage: 5-8.4v (lithium Battery Supply) Working Current: 1.6a (max) Input Impedance: 50 Ohm Output Impedance: 50 Ohm Input And Output Terminals: Sma-k Female (male Threaded Bore) Application: Digital Transmission Extended Range, Remote Control, Interphone Even Power Amplification. Note:due To Different Production Batches, There Are Differences In The Printing Of Appearance Labels, Which W