<br>Specification Bluetooth Version: V5.0 <br>Speaker Diameter: 40mm <br>Dynamic frequency response range:100-10kHz <br>Impedance:32Ω±15% <br>Sensitivity: 103dB ±3dB <br>Operating Range: 33 feet(10 meters) <br>Battery type:500mAh Lithium polymer battery <br>Charging Time: 1.5-2 hours <br>Music Play Time with BT on: 20 hours <br>Cable Length:1.5m±5%