[Universal Power Supply] AC Input: 100-240V 0.5A 50/60Hz, DC Output: 9V 2A 2000mA. DC Polarity: Inner Positive(+), Outer Negative(-). Its recommended that you order a Basicvolt Polarity Reverse Cable with it if your device is inner negative(-) [Versatile AC Adapter] The 9V 2A power supply is equipped with 10 interchangeable DC tips to work for most household electronic devices. And its compatible with 9V 0.5A 1.2A 1.5A 1.8A 200mA 600mA 900mA 1600mA 1900mA and more power adapters with ampere equal to or lower than 2A (2000mA) [9V DC Adapter] This Universal AC to DC Adapter will work for your Arduino Boards ( UNO R3/ Elegoo UNO R3/ IEIK UNO R3, MEGA 2560, Duemilanove ), Crosley Cruiser Portable Turntable Record Player, Schwinn Proform Bike, LED Strip Light, Webcam, Baby Monitor, Security Camera, Router, Electronic Kitchen Scale and more 9V electronic devices [Premium & Safe] Basicvolt AC Adapters are made of premium materials. Durable, Reliable, Stable, A good helper for your da