You can use the power cable while visiting United Kingdom UK England or use to power device from USA in UK. Ideal for Laptop notebook computer's adapter and many more electronics using the 3 prong power cord (IEC320 C5) power connector. The other end is UK United Kingdom type plug for AC outlet (BS1363) Polarized with fuse. Get better power contact compare to using an international travel plug. Standards: UL, CSA, ISO 9001:2000 manufacturer. Note: Please make sure proper voltage switched / international compatibility checked on the device before plug in. Cable only transfer power and does not convert voltage.