Type: Bluetooth speaker Battery capacity: none Signal to noise ratio: 75dB Play time: no limit to power play time Number of speakers: 2 Operation mode: button Playback format: MP3 Format support: U disk Material of the box: metal Power supply mode: AC Connection method: Bluetooth connection Frequency response range: 100HZ-20KHZ Power supply mode: need a power bank Storage of extension: the machine has no storage, storage devices can be added Effective distance: 10 meters Shell material: metal Speaker adjustment method: touch Appearance size: 135*135*70MM Colors: white , black Interface type: USB Output power: 36W Channel: 2 Bluetooth protocol: 4.1 Function: radio, dustproof, voice prompt, call function Display: Yes Whether to support APP: No Is there a radio function: Yes Product weight: 0.69 (KG) Product list e package: host, power supply, audio cable, warranty card, manual