Gooray 32Ch 5.8G 600mw 5km Wireless AV Transmitter TS832 Receiver RC832 for FPV Compatible Universal video transmitter and receiver for all, compatible with various kinds of remote control toys (RC helicopter,quadrocopter, airplane and boat etc.) Power off memory: Replay the very last frequency band and channel 600mw transmitter power assure 5KM distance in open area, 5-8 KM is available if work with the bigger gain antenna Built in Digital display and push button for easily channel change - Durable and lightweight 32 channels: Cover A, B, E bands and F band (Airwave band), 4 bands and all frequencies compatible