AC/DC Power Adapter design with a flat US plug to 5.5x 2.1 mm Male plug and long cable. It works at AC 100V to AC 240V 50/60HZ and output DC 9V/2A with a 5.5×2.1mm center-positive barrel jack. It works great for any device with the DC 9V/2A power supply. Features Excellent Quality Short Circuit, Over Voltage & Over Current Protection Incredibly Low Fault Rates No Minimum Load This power supply is a regulated Center Positive power supply Compact size & light weight High Reliability Regulated Stable Voltage Good quality SMPS Based Adapter Stabilized Output, low ripple & low interference Single Output Voltage High Efficiency & low energy consumption Details Input voltage: 100~240V AC Rated Frequency: 50~60Hz Output Voltage: 9V Max Output Current: 2A Adapter Standard: US Standard Output Type : DC Cable Length: 3 ft