Wireless receiver and transmitter mainly used for wireless rear view camera Please note: Because the wireless signal is the same, one wireless unit is limited by the vehicle. Parameters Receiver/Transmitter Frequency: 2370MHz Power: 100MW; Voltage: DC 12V; Video IN/OUT: PAL composite video signal / NTSC< /p> WORKING TEMPERATURE: -20°C - +80°C AV Receiver Sensitivity: -85dBm; Working Current: DC 12V 200mA;; Package Included: 1 x Wireless Receiver (Red light on), 1 x Wireless Transmitter (Blue light on)