The ELG-200-C2100D23Y is a part of Mean Well's ELG-200-C series of 200 watt desktop-style open frame AC/DC power supplies. This specific model has an input voltage of 100-240V AC, single output voltage of 27V DC, and an efficieny of up to 91%. It also has an adjustable output voltage range of 25.2 - 28.8 V DC, 0 - 100 % of the rated current, active power factor correction, and full protection for overload, over-voltage, and short circuit. This power supply is ideal for computer peripherals, medical equipment, testing instruments, and communication systems.