... >Direct factory OEM >9CH Transmit >R&D 30km wireless transmitter with 5.8G 9 Channel 200mw 400m unobstructive range ... antennas,2 AV cablesSpeification: 9CH 5.8G 200mW Wireless AV Transmitter ReceiverItemValuePower SupplyDC12VTx Channel9 channels(digital display)T/R ... degree ~ +50 degreeTx Dimension53*41*14mmPackage included12CH receiver, transmitter, 2 antennas, AV cable, TX cable, Installing Manual ...