AKK FX3

Buy the AKK FX2 VTx from Banggood

FX3 is a small 5.8GHz VTx. It has 20 x 20 mm spaced holes to mount it on a Flight Controller stack. You attach the antenna with an MMCX connector.

It has 37 channels and has has switchable power levels of 25, 200, 400, and 600 mW. You can use SmartAudio to change these settings. There is a filtered 5 Volt power output for a camera.