... with anti-distance transmission capability, transmission distance: 300metres, 600metres, and 2500metres. support all of the video format, include PAL, ... circuit transmission, small volume, capacity with lightning-proof and anti-jamming.Specification:Item 300A1600A1,5001B,600A4,600A8,600A16Transmission signals ... 8 channels 2500m video transmitter receiver(with power) in stock passive video transmitter