Specifications:
Model Number: i7s
BT Version: 5.0
Transmission Distance: 10m (no obstacle)
Frequency Response: 20Hz-20KHz
Sensitivity: 42dB
Impedance: 32O
Battery: Earphone: 2 * 40mAh
Charging Time: about 1.2 hours
Working Time: about 2 hours
Standby Time: about 100 hours
Color: Black, White (Optional)
Earphone Size: approx. 4.7 * 1.8 * 1.8 cm / 1.85 * 0.70 * 0.70 in
Item Weight: approx. 4g / 0.12 oz
Package Size: approx. 8.0 * 7.0 * 2.0 cm / 3.15 * 2.75 * 0.78 in
Package Weight: approx. 20g / 0.71 oz