4-CH real time receiver Description:>Infra-red LEDs for night-time ... picture display,Weather-proof design for outdoor usage,Alloyed shell> 4-channel real-time wireless receiver,Alloyed shell, Antenna can be ... transmission distance without blockReceiver:Transmission frequency ISM 2,400 MHz~2,483 MHz 4CH Receiving Sensitivity -85dBm Power Adapter DC 5V/1000mAtransmission ...