Lenovo Wireless Earphones

Brand Name: Lenovo
Model Number: HT18
BT Version: 5.0
Transmitting Distance: 10m/33ft
Drive Diameter: 8mm
Frequency Range: 20-20KHz
Sensitivity: 110+/-3dB
Impedance: 32 Ohm
Charging Case Battery Capacity: 3.7V 1000mAh
Earbuds Battery Capacity (Each): 3.7V 40mAh
Music Play Time: about 4 hours (depends on music volume)
Standby Time: about 60 hours?? ?
Charging Time: about 1 hour
Color: Black,