The BK Precision 9110220V Programmable Multi-Range Digital DC Power Supply, 60V/5A, 100W, 220VAC Line Input automatically recalculates voltage/current limits for each setting. The multi-ranging feature offers exceptional flexibility by providing any combination of the rated voltage and current up to the maximum output power of the supply. The 9110-220V comes with built-in OVP (overvoltage protection), OTP (overtemperature protection), and OLP (overload protection) circuitry. These protections help prevent serious damage to equipment in case of power supply failure.