Specifications: 1. Support the MINI SD card / TF card, 2. Built-in rechargeable lithium battery 3. Can play 3-5 hours 4.USB2.0 power supply interface Details: 1. Stereo sound, the appearance of novel and unique, small and exquisite workmanship; 2. Support MP3 format music files; 3. Supports MINI SD / TF card; 4. Support 7 EQ; 5. Built-in 500MAH rechargeable battery; 6. Memory function, automatically play songs from the last time to start playing; 7. Support 1GB-8GB MINI SD / TF card. 8. FM( OPTIONS)