Type: Bluetooth SpeakerConnection method: Bluetooth connection Interface type: USB Battery capacity: 1200Frequency response range: 100HZ-20KHZ Output power: 2.1 Signal to noise ratio: ≥75dBPower supply mode: Built-in lithium battery Channel: 2.1 Play time: 6 hoursExtended storage: 32GB Bluetooth protocol: 2.1 number of speakers 1Effective distance: 10 meters Function: Voice prompt, card, radio, call function, mobile power Flashlight: operation mode buttonApplicable people: Universal Display: None Playback format: MP3Shell material: plastic support: support APP: no support format: TF cardSpeaker adjustment method: Whether the button has a radio function: Yes Box material: PlasticAppearance size: 150mm * 35.6mm