Product information:  Type: Bluetooth speakerConnection mode: Bluetooth connection / 3.5mm audio holeInterface type: USBBattery capacity: 2000mhaFrequency response range: 20Hz-20KHzOutput power: 5W * 4SNR: ≥ 70dBPower supply mode: Built in lithium batteryChannel: 2Duration: 6 hoursExtended storage: 32GBBluetooth protocol: 5.0Number of horns: 4Effective distance: 10MFunctions: Card insertion, Remote control, Radio, Voice promptOperation mode: KeyDisplay: NonePlayback format: MP3, wma, WAV, FLCShell material: Metal + PlasticWhether app is supported: noSupported formats: Bluetooth, FM, TF, 3.5mm, U disk, RCASpeaker adjustment mode: Key + remote controlWhether there is radio function: YesBox material: Metal + PlasticDimension: 550 * Φ 60mm (length * diameter)Packing list: charging cable, RCA cable, manual, remote control