Close Shave - even on the neck: Close-cut heads are precision-engineered for a reliably close shave every time. The durable, self-sharpening blades won"t wear down so your shave is always fast and clean. Preferred* by 80%, flexing & floating heads follow the contours of your face, allowing for better contact with your skin and for catching more hairs, resulting in a closer, faster shave. Pop-up trimmer is perfect for your sideburns, moustache and for quick touch-ups on the back of your neck. Up to 35 minutes of cordless shaving with an 8 hour charge. Can also be used while plugged in, for continuous power when you need it.