DC adaptor converts AC electricity into DC electricity. 12 Volt DC 3 Amp power supply is suitable for powering many applications, including CCTV cameras, wireless routers, Robotics, and DIY kits.This Power Supply is a Regulated Center Positive Power Supply Has a Compact Size & Light Weight. Regulated Stable Voltage. Good Quality SMPS Based Adapter Power LED Monitor (LED Glow When in Use) Stabilized Output, Low Ripple & Low Interference High Efficiency & Low Energy Consumption.