Click here to download the manual: tx805s.pdf Specification: Input Voltag: 7V to 24V 5V Camera Supply: 220mA(MAX)----25mW@12V(Type)5V Camera Supply: 470mA(MAX)----500mW@12V(Type)5V Camera Supply: 550mA(MAX)----1000mW@12V(Type)5V Camera Supply: 830mA(MAX)----1600mW@12V(Type)Extra features:Smart Audio Power Supply: 5V output for CameraOutput Power: 25mW/500mW/1000mW/1600mW switchableAntenna Connector: MMCXCable connector:Solder padsDimensions: 36mm*22mm*5mm,30.5 stackable holeWeight: 11.3g(excluding antenna)Button control Channel select modeChannel select:Select channels by simple short presses.Blue LED light on stands for CH1, short presses to change 8 channels sequentially.For CH2/ 3/ 4/ 5/ 6/ 7/ 8, Blue LED flicker once, it won't light on.Notice: Blue LED only light on for CH1 Band select:Press button for 2S, Red LED will flash, then short presses to select 5 bands. Power select:Press button for 4S, Red LED will flash, then select power by simple short presses to select 25mW/ 500mW/ 1000mW sequentially,For 500mW, Green LED flicker once, it won't light on; For 1000mW Blue LED flicker once, it won't light on. Press the button again,Red LED, Green LED and Blue LED lights together, Represents the highest power 1600mW.Notice:Red LED only light on for 25mW. Pit Mode(0.01mW)While in Pit Mode you can change channels and power levels, but none of these changes will take effect until you quit Pit Mode.By default, Pit Mode will send a very weak signal. Two ways to exit pit mode: Press button 12S until all 16 LED turned off and light on again to exit pit mode, or you can exit pit mode via Betaflight OSD.Notice:The VTX has memory for settings, To change the settings, please repeat steps as above. Features:-Support Smart audio-25mW/500mW/1000mW/1600mW power switchable-One button frequency and power setup-OSD configuration using smart audio-Wide input Voltag with 5V for camera-40 channels with MIC-Solid MMCX Antenna connection and MMCX Brass Dipole AntennaPackage included:1 x TX805S- 5.8GHz 40CH AV Transmitter VTX 1 x pigtail1 x Antenna1 x Instructions