Note:  1. This product cannot be started during charging. It will also stop running after starting. Please use it after charging. 2. This product is not designed for full body waterproofing. The cutter head can be washed (after cleaning, wipe off the water and wipe it with a dry cloth). Do not rinse the whole machine in water or under the faucet. Do not wipe the appearance with a damp cloth.    Specifications:  Product Name: Men's Electric Hair Clipper.  Input voltage: 5v-500mA or more (usb).  Charging method: USB charging. Comb(4pcs): 3/4/5/6 mm.  Charging time: 4 hours.  Color: red, gray (Options).  Power: 3w.     Features:  1. This newly designed hair clipper is small enough to easily trim the beard and hair of the face, just like your own hand, and easily touch every position.  2. Touch the switch design to feel the comfort and convenience of digital products.  3. USB power supply with universal voltage, computer, mobile phone and other power supplies can be fully compatible, can be charged anytime, anywhere.  4. Built-in nickel-metal hydride rechargeable battery, with intelligent charge and discharge protection, low voltage reminder and other functions.  5. The hair clipper can be rotated 360 degrees, 8 directions, to facilitate haircut and trim the beard.     Package included:  1 x Hair clipper.  1 x Charging line plug.  4 x Limit combs(3mm, 4mm, 5mm, 6mm).  1 x Cleaning brush.  1 x User manual(English).     Attention:  Start/stop switch, tap start, then press stop, LED display light white light indicates charging, charging type, white light is off indicating charging is finished, red light indicates low power when using, need to be charged, if red is found at boot The flashing light indicates that the battery is low.  Please charge it for 4 hours before using it.