The AD-55AAL is a part of Mean Well's AD-55 series of AC-DC power adapters. It is a 55-watt adapter that converts AC power input (from a wall outlet) to DC output for powering devices like tablets, medical equipment, and more. This particular model has a 5V/11A output and a universal 100-240VAC input. Additionally, the AD-55AAL has safety certifications including UL, FCC, CB, PSE, and BSMI. It also has a power factor correction circuit, overload protection, short-circuit protection, and over-temperature protection.