The Xtar 5v 2.1amp Plug Adapter is suitable for only for use with XTAR chargers. Our chargers will regulate the amps coming into the device to guarantee device safety. Our UK plug is CE and ROHS certified as standard. PLEASE NOTE: This plug is not suitable for the following. VP2 / VP4 / DRAGON / PANZA XP4 / SV2 ROCKET. These chargers come with the correct mains adapter included. Please throughly read each XTAR product description to see if you need a plug. In the instance your purchasing any unit not supplied with a plug then the USB mains plug is optional.