... 5.Unobstructive Effective Range:400m6.Package:12CH receiver,transmitter,2 antennas,2 AV cablesSpeification: 9CH 5.8G ... 200mW Wireless AV Transmitter ReceiverItemValuePower SupplyDC12VTx Channel9 channels(digital display)T/R Frequency5 ... degree ~ +50 degreeTx Dimension53*41*14mmPackage included12CH receiver, transmitter, 2 antennas, AV cable, TX cable, Installing Manual ...