Portable and mini design Supports MP3 format audio file Can directly play music from TF-Card through TF-Card Slot. Built-in rechargeable battery LOud and Clear Hi-Fi Sound. Easy to use and operate with buttons Designed for playing your favorite music and enjoying the music freely and conveniently High Speed USB Port, loading all your favorite songs in minutes Sideway IO: Power button, Mini USB port, microSD card slot and 3.5mm earphones jack Universal Audio Port: With universal 3.5 mm Earphones jack, can be widely used in other audio devices.