If you want to power up your USB devices without plugging into your PC, this Master plug 4-Gang Surge Protected Extension Lead with USB Ports is a brilliant option. It provides 2 meters of extension cable and also features two powered USB sockets that let you charge up devices such as cameras and mobile phones. This Master plug 4-Gang Surge Protected Extension Lead with USB Ports is so good, it comes supplied with an Unlimited warranty against damaged equipment. SURGE PROTECTION ADVICE. Hundreds of power surges can occur in your home and office every day. The switching on/off of fluorescent lights and household appliances like refrigerators, washing machines and tumble dryers can cause power surges and spikes. MASTER PLUG SURGE WARRANTY. Confident in our ?state of the art? technology Master plug Surge products come with a ?Connected Equipment Warranty?. In the unlikely event that a surge passes through this protection device within 3 years of purchase and damage occurs to the connected equipment, Master plug will pay an unlimited amount to repair or replace the equipment. Master plug stands by the quality of its Surge products.