1. wireless transmission 2. AV transmitter and receiver 3.12CH 1000mW wireless system 4.2. ... .3G/2.4G.(2.4G standard 12CH 1000mW Wireless system AV Transmitter and receiver, wireless transmission module*Transmit Power:1000mW.*Frequency ... Range:1~3 KM.*Package:12CH receiver,transmiter,2 antennae,AV cable,TX cable.