Product Interest letter:Brand: RunningFunction: Bluetooth, cardApplicable scenario: desktop, fitness, outdoor, home, mobile portable, outdoor lawnType: Bluetooth speakerConnection method: Bluetooth connectionInterface type: USBBattery capacity: 2200 mAhFrequency response range: 100Hz-20KHzOutput power: 10WSignal ratio: ≥75dBPowered mode: built-in lithium batterySound: 2Playing time: 8 hoursBluetooth protocol: 4.1Trumpet number: 2Effective distance: 10 metersWay: ButtonShell Material: WoodSupport format: SD cardSpeaker adjustment mode: buttonBox material: woodenProcessing method: OEM processingShipment company: YuantongItem No .: Cool RunboxSpecifications: Walnut + Wooden Net, Walnut + Iron Net, Beech + Wooden Net, Beech + Iron NetworkPower mode: USBBluetooth version: 4.2Package:Bluetooth speaker*1