Wireless kit, receiver & transmitter. 1,00mW Wireless Transmitter System with 2.4GHz Receiving Frequency Model:PK-702A(2.4G/100mW) Features: 4CH 2.4G 100mW Wireless Transmitter ReceiverItemValuePower SupplyDC12VConsumption ... ° ~ +50°Dimension41*28*16mmReceiver Dimension115*80*21mmWeight (Tx)28gPackage12CH receiver,transmitter,2 antennas,AV cable,TX cable