Enclosed AC-DC switching single output power source with battery charger (UPS Function). Universal AC input / Full range. Battery low protections. With power LED indicator and overloading protection, short-circuit and over voltage. DC voltage output: 54 VDC - 2.7 Amp current intensity. Battery Channel: 53.5 VDC - 0.2 Amp. Cooling by free air convection. Fixed switching frequency at PFC 67 KHz and PWM 134 KHz. Output rated power: 156.5 W.