In the power pack, you can get Four Independent Power Supply Ports

Full Power Efficiency at -30 °C to +70° F (-22 °F to 158 °F)

Accurate Over-current and Over-voltage Protection

Single Channel Video Transceiver
PAL/NTSC Real-time Video Transmission;
Exceptional Interference Rejection and Built-in protection Setting;
Convenient Wiring Installation, Higher Cable Utilization Rate, and Lower Composite Wiring Cost;