Model: i9s
Bluetooth version: V5.0
Speaker: High quality real copper ring speaker
Chip: True stereo chip
Playback time: 2-3 H
Headphone battery capacity: pure cobalt 40 mAh
Rechargeable case battery capacity: pure cobalt 400 mAh (with protection plate)
Effective distance:10+M
Headphone weight:33g (including charging case), 7g (pair of headphones)
Whole set weight:113g
Package size:8*8*5.5cm
Standard equipment: headphones * 2 + charging case + mircoUSB charging cable + manual + packing box + silicone case + hiking