Features: Card insertion, radio, and call functions Suitable for office, home, mobile, and portable use 40mm speaker unit Bluetooth speaker type Bluetooth connection method USB interface type Frequency response range: 60Hz-16KHz Output power: 5W Signal-to-noise ratio: ≥75dB Built-in lithium battery power Mono audio Battery life: 2 to 10 hours 16GB expandable storage Bluetooth protocol: 5.0 Number of speakers: 1 Effective distance: 10 meters Button operation Suitable for general use No display Playback formats: MP3, WAV Plastic shell material No AP support Supports TF card Button speaker adjustment Radio function: Yes Plastic casing material Dimensions: 120*30*60MM Product weight: 0.160 (KG) Package contents: charging cable, manual Standard configuration: color box / charging cable / English manual Power source: USB Water resistance: Not waterproof Bluetooth version: 5.0 Housing design: material, color painting Built-in battery capacity: 300mA-500mA Battery capacity: 500mAh