Perfect gift for him! 1. The Rotatory Heads Use The 4D Float System Which Allows The Heads To Flex 360 Degree For A Smooth Shaver. 2.Shave Wet or Dry - Enjoy the convenience of a quick shaving machine using dry operation or use wet with foam or gel for a smooth shave. 3. Fast Charge - It can provide 120 Minutes of cordless shaving time after 2 hour of charging. Even if the device is out of power, you can continue to use it while charging. 4. USB on-board charging - It can be charged by computer, car and power bank whenever you want, perfect for your traveling. Warm Tips: You can use sideburns trimmer to shave long beard first if necessary, then shave with razor head for better results.