Please note : MMCX to SMA connector ( Hole Inside ) Mouting stackable: 20x20mm FX3 is similar to the FX2 but has a smaller profile that uses 20x20mm mounting pattern, in the cost of lower max output power, to be designed for smaller micro builds. It support parameter adjust and work with Betaflight, and compatible with BF OSD FC. It is worth mentioning that both mmcx and sma connector are available. Features : 25mW/200mW/400mW/600mW power switchable Support parameter adjusted and work with Betaflight,flight controller,OSD Super mini size and light weight,One button frequency and power setup. 7-24V input and can be provides 5V output for your camera. Filtered power ensure super clean video, born for racing. Notice: The VTX can supply 5V output for Camera. Please make sure your camera is less than 300mA Key features: Support Parameter-adjusting mode 25mW, 200mW, 400mW and 600mW power switchable One button frequency and power setup OSD configuration using FC Uart 7-24V input with 5V output Package included: 1 x 5.8Ghz 40CH 25mW/200mW/400mW/600mW Switchable FPV Transmitter 1x Antenna and cable set 1x Product manual