1.Brand Name: Lenovo
2.Model Number: X4
3.BT Version: 5.0
4.Transmitting Distance: 10m
5.Drive Diameter: 16mm
6.Frequency Range: 20-20KHz
7.Sensitivity: 119±3dB
8.Impedance: 30Ω
9.Charging Case Battery Capacity: 250mAh
10.Earbuds Battery Capacity : 150mAh
11.Music Play Time: about 7 hours
12.Color: Black