Product parameters 
Model：S11
Style:In-ear
Bluetooth Version: 5.0
Bluetooth use band: 2.402GHz-2.480GHz 
Support Protocols: A2DP,AVRCP,HFP,HSP
Bluetooth Distance: 10m
Talk Time：3-4 hours
Listening Time: 3-4 hours
Battery Capacity of Earphone: 40mAh
Battery Capacity of Charging Case: 2500mAh
Operation：Touch
Waterproof：Support
Charging time of earphones: around 1 hour
Charging Case Size: 70*50*30mm
Package list:
1 * One Pair of Bluetooth Earphones 
1 * Charging Case 
1 * Charging Cable 
1 * User Manual