2CH Video Multiplexer for Security System with Signal Transmission Distance up to 500m. SUPPORT: 1. AHD 1080P max. 500m; 2. TVI 1080P max. 400m; 3. CVI 960p max.500m; 4. ANALOGUE. Product Parameters: composite video transmitter: Video input: two video inputs Input amplitude: 1.0Vp-p Input port : BNC Input impedance: 75 ohm RF output: less than or equal to 100dBuV Output Ports: BNC (75 ohm) Input : positive inside, with a short reverse protection circuit Transmission distance: less than or equal to 500m ( Note: Different transmission cable will affect the quality of the transmission distance, suggested the of high-quality video cable SYV-75 or RF cable SYWV-75, diameter -5 and above ) Dual composite video transmitter receiver: A: RF input: two -way RF input Maximum input level: 90dBuV Minimum input level: 60dBuV Input port: 75 ohm B: Video output Road video output signal Output Ports: BNC Block (75 ohm) Output Level: 1.0Vp-p Colour: black Material: aluminum alloy Package Contents: 1 Pair x video multiplexer Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.