Wolfwhoop W833 5.8GHz 600mW Mini FPV Transmitter Double LED Display FPV Audio Video Transmitter Transmitting power: 600mW, designed for all kinds of drones Two switching buttons: easy to change frequency channels and bands Bundled with antenna: Transmitting distance &gt;3000m (open area) Micro sized (dimension: 1.2x 1x 0.3inches) and light weight (Only 0.28 ounces) 40 channels, cover A, b, E, F, r bands