Masterplug srgausbpb surge protected mains usb adaptor and charger masterplug srgausbpb p the masterplug srgausbpb is a surge protected mains usb adaptor and charger the charger has two usb outputs that are ideal for use with iphone ipad ipod mp3 s mobile phones pda s and digital cameras the plug is surge protected via the 13a socket to protect any connected electronic equipment p p the plug through design ensures that surge protected socket is available whilst the usb adaptor is