Multiple functions: music playback, video playback, sound recording, FM radio, e-book, picture browsing, alarm function, date and time function (including setting time and setting date) Upgrade Bluetooth 5.0: Superior signal easily compatible with TWS & Bluetooth headset & speakers FM radio function: Support common band: 87.5MHz~108MHz, Japan band: 76MHZ~90MHz, European band: 87.5MHz~108MHz Back clip design: Designed with a back clip for easy hands-free use Recording function: Clear recording for meetings/class/interview Support multiple languages: English, German, Italian, Spanish, Dutch, Portuguese, etc. Specifications: Size: 66*41.5*18mm Product weight: about 34 grams Display: 1.77 inches? Resolution: 128*160 Bluetooth: V5.2 Audio format: APE (Fast/Normal compression, 800Kbps-1000Kbps, sampling rate 8KHz-48KHz) FLAC (1000Kbps-1200Kbps, sampling rate 8KHz-48KHz) MP3 (8Kbps-320Kbps, sampling rate 8KHz-48KHz) WMA (5Kbps-384Kbps, sampling rate 8KHz-48KHz) WAV (32Kbps-1536Kbps, sampling rate 8KHz-48KHz) AAC-LC (8Kbps-320Kbps, sampling rate 8KHz-48KHz) Video format: AVI 128*160 (conversion tool required) Recording format: WAV Picture format: support JPG/JPEG/BMP E-book format: TXT document TF card expansion: ≤128G (TF card not included) Charging input: 5V 1000mA E-book format: TXT Battery: 1000mAh 3.7V polymer battery Charging time: about 2 hours Supported operating system: WindowsXP/vista/Windows8/for Mac os10.12 and above