This is a solid piece of VTX that has all the features you'll need: switchable power output, channel changing via betaflight OSD, durable MMCX connector, stackable 30x30 mounting holes, and a crystal clear picture.
-Input voltage: 7-24V DC
-Power transmission: 0mW / 25mW / 200mW / 400mW /600mW
-Size (mm): 37 * 37 * 5
-Weight: 6g(Does not contain antenna)
-Connector type: MMCX Connector w/ whip antenna and SMA antenna connector
Note: To use the IRC Tramp protocol to control channel and power output, make sure your flight controller supports Betaflight OSD. Then connect the "RX" wire to a free UART TX port on the flight controller. Enable "IRC Tramp" on that UART port in betaflight and you'll be good to go.