Connection method: Bluetooth connection Frequency response range: 100HZ-20KHZ Power supply mode: built-in lithium battery Extended storage: not supported Effective distance: 10 meters Shell material: metal Loudspeaker adjustment method: speaker: button Appearance size: chicken headphone Supply category: Spot Interface type: USB Output power: 3W (max) Channel: 2.1 Bluetooth protocol: 4 Function: waterproof, dustproof, anti-drop , call function Display: Yes Whether to support APP: No Is there a radio function: Yes Product weight: 0.259 (KG) Packing list: USB charging cable + packaging + manual Power mode: USB Type: Bluetooth speaker Battery capacity: 500mAh Signal to noise ratio: 75dB Playing time: 8 hours Number of speakers: 2 Operation mode: button Playback format: MP3, WMA , WAV Media format: SD card Box material: metal