Micro USB Chargesmart Universal Charging Kit- the intelligent approach to reducing Vampire Power. Patented design USB charger communicates with cell phones and automatically turns off when phone no longer requires power (when phone stops charging cycle or is unplugged from charger). The charger uses zero power when not charging a device, even if still plugged into the outlet. Eliminates Vampire Power usage during entire cell phone charging cycle, whether the phone is attached or not. Automatically turns back on when cell phone is attached. Indicating LED light provides visual status of battery charging, on when charging. off when fully charged. Compact design, available in 5 attractive colors. Works with all major brands of phones, using micro-USB cord.