1.BT Version: BT 5.0
2.Frequency Range: 20-20000Hz
3.Transmission Distance: 10meters (no obstacle)
4.Charging Case/Earphone Battery Capacity: 3.7V 300mAh
5.Working Time: about 2-3 hours 
6.Color: White, Pink, Blue(Optional)
7.Earphone Weight: 4g/0.1oz 
8.Charging Case Size: 7*4*2cm/2.8*1.6*0.8in
9.Charging Case Weight: 39g/1.4oz
10.Package Size: 14.5*8.5*2.5cm/3.5*2.8*1.2in
11.Package Weight: 72g/2.5oz