Wireless 5.0 Bluetooth, free listeningwireless technology, reduces delay, fast transmission of data, strong level of anti-interference, supports Bluetooth background playback, supports fast forward and reverse. Important: This MP3 player is a Bluetooth transmitter, not a receiver, it cannot be paired with mobile phones.Lossless HiFi sound qualityHigh-quality chip, supports MP3 / WMA / APE / FLAC / WAV / DRM / ACELP and other formats with losing sound quality. Smart digital noise reduction using a professional smart noise reduction master chip, which can block out noise and protect you from sounds. The level of sampling maintains the genuine sound of the music.Strong functional design Listening to music, recording, FM radio, folder, settings, Bluetooth, calendar, video, e-book, stopwatch, alarm clock, time saver, breakpoint playback, A-B repeat mode, text synchronisation.1.8 inch screenTF card can be used: clear and beautiful display, low power consumption, more energy saving, 7 buttons, with independent volume buttons and on/off buttons, elegant and easy to use, with 32G memory, the highest to 128G, higher level of compatibility.Small and LightweightEasy to carry, matching arm strap, small, weight: 30 g, stylish appearance, small design."