I7 TWS MINI I9 Mini TWS Wireless Bluetooth

1.Item Name: Mini Portable Hifi Stereo Bass Wireless Bluetooth 4.2 Earplugs Earphone
2.Bluetooth Version: V4.2
3.Impedance: 32O
4.Sensitivity: 42 dB
5.Frequency range: 20-20KHz
6.Transmission Power: Class 2
7.Transmission Range: About 10 m
8.Frequency: 2.4GHz
9.Color: White,