Charging Use: Our updated electric nail file does not require a battery. We have equipped a USB data cable. You only need to charge it instead of replacing the battery. After fully charged, our electric nail can work for up to 2.5 hours. If you have any questions about our products, please contact us immediately. 4 Rotation Modes: The baby nail trimmer set adopts a one-button design. There are four gears to be adjusted by sliding up and down, high and low-speed modes, clockwise and counterclockwise rotation directions. The low-speed fit baby and high-speed fit adult. Quiet and LED Light: Our baby nail clipper is created with a front LED light, effectively ensuring to use in the dark night and it is whisper-quiet adopt 46DB low-vibration stable motor enough to not wake the sleeping baby. 14-In-1 Value Care Grinding Heads: Our baby nail trimmer is equipped with 14 replacement file heads. 3 different colors of nail trimmer pads are specially designed for the different stages of the baby's growth and various needs. Adults use a cylindrical grinding head, a metal grinding head, and a wool polishing file head. The 14 kinds of replacement heads sets can be used for children from 0 to 12 months or older, and adults. ?2-In-1 Nail Clippers & File: The upgraded baby nail trimmer is professionally designed for baby nail trimming by combining baby nail file and baby nail clipper functions. The perfect combination of the two makes it more convenient for you to trim your baby’s nails and easier to carry.