Details Specification - Connection method - Bluetooth connectionInterface type - USBFrequency response range - 20Hz-20KHzOutput power - below 10WSignal-to-noise ratio - ≥75dBPower supply mode - built-in lithium batteryChannel - 2.1Playing time - 6 hoursExpandable Storage - 32GBNumber of speakers - 1Effective distance - 15 metersOperation mode - buttonDisplay - nonePlayback format - MP3Whether to support APP - NoSupported format - TF cardSpeaker adjustment method - buttonWhether there is a radio function - noBox material - ABS+; MetalAppearance size - 78*78*110MMPower supply - USBWaterproof grade - IPX 4Built-in battery capacity - 1000mAh-1200mAhBluetooth protocol - 5.0 Package Includes - 1*Speaker1*Charging cable1*Instruction