Bluetooth compatibility: This MP3 player supports Bluetooth compatible version 4.0 and supports audio playback in MP4 format. Compatibility: Bluetooth-compatible music player is a substitute for Windows XP/VISTA/Windows 8. Audio recorder: This external MP3 e-book supports audio recording, so you can use it as a recording tool. p> With memory card: This MP4 recorder has the function of memory card, which can mark the reading position and scan automatically. Portable: This music electronic product is compact and very suitable for carrying around. Specifications: Music playback: supports MP3, WAV and other sounds. Recording support: FM mic recording, MP3 WAV format support. Image browsing support: browse BMP jpg format. FM radio support Advanced: including (recently read books, annotations, autobrowse) Day/night mode System support: WINDOWSXP/VISTA/WINDOW8. Capture format: MP3/WAV Maximum support: 128G TF card (not included) Help read the document extension Language support English, Chinese, French, Indonesia, Portuguese, Spanish and Italian. p> Support Bluetooth receiving and sending. Bluetooth: 4.0 supports bidirectional transmission. Size: 90.5mm x 39.5 x 10mm. Net weight is about 31g. Packing list: 1 MP3 player (excluding TF card) 1 User Guide 1 USB cable