RUIZU - M8 Mini Bluetooth MP4 Player with Detachable Strap, 8GB Touch Screen, Support Wrist Watch, FM Radio, Recorder, E-Book, Video Specification: Model: RUIZU M8 Material: Zinc Alloy Screen Size: Screen 1.54 inch IPS HD Resolution: 240*240 Key operation: full key Size: 46.5*37*12mm Bluetooth: V5.0 Bluetooth connection distance: straight line distance is about 10 meters without barrier Music format: MP3 / WMA / APE / FLAC / WAV / DRM / ACELP Video format: AMV / AVI Recording format: wav / MP3 Recording distance: straight line about 3 meters Microphone: built-in microphone single microphone Lyrics format: format LRC E-book format: TXT format Image support: JPG BMP format Compatible systems: XP (Home, Professional, with SP1, SP2, SP3) 32bit / Windows 7-10 64bit USB connection: USB.2.0 Headphone specifications: Type Of support-C-USB headphone interface Headphone impedance: 16 or 32 Pu Headphone output power: 10mW @ 32, 20mW @ 16 Charging/connection interface: Type C-USB interface, charging cable. Built-in battery: 180mAh Charger specification: 500ma-1A output Full charge time: about 2 hours Functions: music, video, recording, radio, step counting, pictures, e-book, Bluetooth Package includes: 1 X MP3 player 1 X Wired earphone 1 X USB cable 1 X Detachable strap 1 X Manual