Tips VTX is set to 25mW by default! Power levels above 25mW require a HAM license or have to be approved by local authorities! Please ensure you're flying legal frequencies and use our prepared Betaflight VTX tables according to your region. Specifications: Interface: MMCX Power levels: PIT/25mW/400mW/1000mW/2500mW Mounting pattern: 25.5x25.5mm/Φ1.6 Dimensions: 50*30*16 mm Lightweight: 32g VTX telemetry: IRC Tramp LED Indicator and Function Button Power Button: Press and hole for 2s: Enter or exit PIT mode, solid green light indicates entering PIT mode Short press: Green light (output power): The number of LED flashing indicates the VTX output power. Short press to change output power.1 flash=25mW, 2 flashes=400mW,3 flashes=1000mW, 4 flashes=2500mW. Band and Channel Button VBAT: 2-8S，7-34V DC Positive Input GND: Negative IRC: IRC Tramp Signal Input Video in: Video Signal Input Camera out: Camera video output 5v out: 5v Voltage Output GND: Negative Camera in: Camera video Input Packing List 1 x BLITZ Whoop 4.9G 2.5W VTX Attention 1. Please read the instructions for proper wiring before use. 2. It is recommended that before switching on the power, make sure that the antenna has been installed, it can extend the life of the module. 3. It is recommended to ensure the correct voltage range and the correct positive and negative polarity before switching on the power to avoid burning the components. 4. Please keep enough space when you install the VTX to ensure air convection around the module for heat dissipation. 5. Otherwise, the module will enable overheat protection and the power transmission will be reduced or even switched off.