Other FeaturesMemory SafetyLock system smartly locks and memorizes the last used length setting even after removing the attachment, The Braun hair clipper is fully washable for easy cleaning under running water, The blades of the Braun hair clipper are engineered for long lasting sharpness. That gives you the precision you need to get the style you want, The Braun hair clipper is powered by a dual battery system. The two Ni-MH batteries are fully charged in 8 hours for 40 minutes of cordless performance. For non-stop operation simply use it corded, The Braun hair clipper automatically adapts to any voltage between 100V and 240V. This makes it an ideal travel companion, An LED light to indicate when the device is charging and when it is fully charged.