? After-sales service? Our MP3 player has a 1-year warranty and 12 hours of customer service. Please contact us if you have any problem during your use, we will solve it for you within 12 hours. Thank you very much for your trust and support!. ?Multiple Formats Support? It can perfectly adapt to a variety of audio playback formats, supported music formats are MP3, OGG, FLAC, AAC, WAV, WMA, APE, and so on. Supported video formats are RM, RMVB, FLV, MP4, DAT, MKV, MPG, MOV, TS, and so on. Can be played directly without conversion. ? Small body with high capacity?This MP3 player Built-in 2000mAh high-capacity Li-ion battery, low power consumption solution allows you to enjoy 50 hours of wired music or 8 hours of movies. Perfect for students, seniors, and sports enthusiasts. Also perfect for Christmas and Halloween gifts. ?Duplex Bluetooth 4.1?It adopts two-way connection technology, which can stably connect to various Bluetooth devices, such as Bluetooth headphones, Bluetooth speakers, car speakers, and so on. You can enjoy your favorite music in different scenarios without having to be bound by wires, bringing you a better user experience. ?Extreme Audio-Visual Experience? Fanvace MP4 player supports HiFi lossless music playback and 720p, and 1080p high-resolution video, with a built-in speaker, enjoy unrivaled visuals and HD music without the need for wired headphones. Whether you're on the go, at the gym, reading at home, studying, or meditating/relaxing/sleeping, this MP3 is perfect for you. ?Easy to Use? This touchscreen MP3 player is built-in with a variety of mainstream media APPs, such as Music, Spotify Kids, Audible, Deezer, YT Kids, Play Store, etc. It supports downloading and installing other apps, and you can also uninstall the apps you don't need at any time, which is perfect for kids!. ? Powerful Configuration?Fanvace MP3 player with Bluetooth and WiFi is powered by Android 9.0 and MTK 8-core processor, with built-in 2GB RAM and 16GB ROM, at the same time, this music player also supports external expansion of storage space through the card slot, the maximum support for 512G, the local and external storage space to meet the storage needs of large-capacity users.