Brand Name: Lenovo

Model Number: XT90

BT Version: 5.0

Transmitting Distance: 10m/33ft

Drive Diameter: 13mm

Frequency Range: 20-20KHz

Sensitivity: 90±3dB

Impedance: 32?

Charging Case Battery Capacity: 3.7V 300mAh

Earbuds Battery Capacity (Each): 3.7V 35mAh

Working Time: about 3 hours (depends on music volume)

Color: Black, White (Optional)

Earbud Weight (Each): 3.5g/0.12oz

Package Size: 13.7*9.0*3.0cm/5.39*3.54*1.18in

Package Weight: 90g/3.17oz