CTOC model is a UL-approved step down voltage transformer rated for loads up to 150 watts/volt amps. It converts AC from 220-240 volts to 110-120 volts, thereby allowing appliances and electronic devices that require 110-120 volts to operate in countries that use a 220-240-volt standard. The transformer’s output is a Type B-compatible (NEMA 5-15R) receptacle that accepts USA and Canada plugs. Power input comes via an IEC C13 receptacle (commonly used in consumer electronics items) and a compatible C14 13-amp power cord plug with the plug type of your choice.