Driver Diameter :40 mm  Bluetooth version: 5.0V  Sensitivity:≤85dB  Audio Jack :3.5mm   Battery capacity :250mAh  Charging Socket : Micro USB  Frequency :20Hz-20KHz  impedance:16Ω±15%  Signal distance: ~10m  Playing time: 6-8 hours  Charging time: 2-3 hours  with attached 3.5mm audio cable(1m)  with 30cm charging cable  MOQ per color: 3000pcs