Transmits power and video signals down a single run of Cat5e cable (up to 300m, AHD 1080p 100m). The receiver module incorporates power conversion circuitry which converts the 24V AC/DC into regulated 12V DC suitable for cameras. Ideal for using existing cabling for security purposes, or to cut down installation costs (compared to coaxial cabling). Includes receiver & transmitter. Sold in a pair.