USB Charging This USB interface can be connected to a computer,car and portable battery ,mobile phone charger, it will take a approximately 3 hours to fully charge the battery. Can use for 30 minutes.- 4 in 1 Hair Removal This women hair remover has 4 replaceable heads: rotatory shaving head/ eyebrow razor/ nose trimmer/ body shaver. You can use on face, arms, legs, bikini lines, nose, eyebrows, etc- Painless and Safe Shaving The stainless-steel circular-blade of this facial hair removal can shaves very smoothly without pulling the hair, it is complete painless,fast and comfortable. lets you banish all your unwanted and unsightly hair, no more redness and irritation.- Washable The womens facial hair removel include 4 cutting head are all water resistant and rotated and disassembled for easy cleaning.