1.Model Number: Lenovo XT82
2.BT Version: 5.1
3.Transmitting Distance: up to 12m (no obstacle)
4.Drive: φ13mm
5.Frequency Range: 20-20KHz
6.Microphone Sensitivity: -42dB±3dB
7.Impedance: 16Ω
8.Charging Case Battery Capacity: 3.7V 300mAh
9.Earbuds Battery Capacity (Each): 3.7V 30mAh
10.Music Play Time: about 4 hours (depends on music volume)
11.Earplug Charging Time: about 1 hour
12.Headphone Box Charging Time: about 1 hours
13.Color: Black, White (Optional)
14.Earbud Size: Approx. 2.8*2.5*1.7cm/1.10*0.98*0.67in
15.Earbud Weight (Each): 4.4g/0.15oz