Mini Wireless Bluetooth Speaker

Type: Bluetooth speakerConnection method: Bluetooth connectionInterface type: USBBattery capacity: 300 mAFrequency response range: 40Hz-20KHzOutput power: 1Signal to noise ratio: ≥70dbPower supply mode: built-in lithium batteryChannel: 2.1Playing time: 2Expansion storage: 16GBBluetooth protocol: 4.0Number of speakers: 1Effective distance: 10 meters