One Video RCA input * 4 Video RCA Outputs * Amplifies Video Signal to Maintain Picture Quality in Multi-Monitor Systems * Amplifies video signal to maintain picture quality in multi monitor systems * This unit is design for in car use and requires 12 Volt DC power input to work (you can connect this unit directly to your 12 volt DC car wiring) * In order to use this unit for home equipments you need to purchase 120v AC to 12v DC 1A/1000mA power adapter (not included in with this unit).