Supports USB power supply; USB power supply. The included USB cable allows you to power your PC, power bank, USB power supply, etc. for easy use. Comes with a variety of useful functions that will help you learn language One-touch Search: Returns 3 seconds during playback and 10 seconds forward with one touch. Speed Control: 11 levels of playback speed can be adjusted slowly and quickly. +10 Skips: Convenient to fly CD tracks 10 at a time. A-B Repeat: You can play the area you want to listen to CDs repeatedly. Supports MP3 playback, supports MP3 playback. More CD teaching materials available. Resume function is equipped with a resume function, so you can play from the location where the device stops when the CD is played and turned off. Equipped with Bluetooth function, you can pair it with your wireless earphones and speakers. You can easily operate it (skip, pause, or play) from your Bluetooth earphones and speakers without taking out the product from your bag. You can also operate it from the side of your Bluetooth device; Pair it with your own Bluetooth earphones and speakers, so you can wirelessly learn language and listen to music in a variety of situations, such as commuting to work or school or at home. Comes with a vertical remote control that is easy to operate. Improved vertical remote control, making it more convenient for commuting to work or school.