Time and date settings. Built in speaker and microphone. Up to 8 hours of extended battery life. Lossless and high fidelity music player. Support multi format music playback and lyrics synchronization. Mini design, with a screen tempered glass on the front to prevent scratches. and portable, easy to put into your pocket, no burden, and worth having. Supports memory expansion and supports micro-SD card expansion cards up to 128GB. Support recording, alarm clock, video playback, electronic photo album, time display, and external speakers. Mini Personal stereo, dance fitness, leisure and entertainment, mountain climbing and cycling, suitable for environments. Wonderful wireless connection, using Bluetooth 5.0, can connect audio devices such as Bluetooth headphones and Bluetooth speakers, providing more stable connection and better sound quality. Operation: Button Memory card type: micro-SD card (not included) Charging interface: micro-USB Headphone interface: 3.5MM dual channel stereo Support audio formats: MP3/WMA/APE/FLAC/WAV/OGG Video format: AMV/ Screen resolution: 128 x160 Standby time: 15 days Battery capacity: 210mAh Battery life: 8 hours (3.5MM earphones listening to music) Bluetooth: 5.0 Suitable audience: students, young people Memory expansion: supports up to 128GB (excluding) Colour: Black Material: ABS Size: Screen size: 1.77 inches Package Contents: 2 x host 2 x USB Line 2 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.