The headsets use a built-in rechargeable battery with non-removable, don't attempt to remove the battery from the headsets, to avoid danger or damage the headsets . 
Use the original charging cable which provides by headsets manufacturer for charging, and choose USB port of computer or regular  brand mobile phone charger which is in computer accord with 5 voltage, 100 mAh-aorta less than 100 mAh -1A  current to charge.  It will damage the headsets if you use over this voltage and current to charge.                            
Follow the use regulations,due to improper use of the users cause damage to the headsets and the danger that shall be borne by the operator.our company won't take any responsibility.
 
Color: White , Black 
Model Number: Xiaomi MI bluetooth headset youth 
Style:In-Ear 
Plug Type:Wireless 
Frequency Response Range:20-20000Hz 
With Microphone:Yes 
Resistance:32Ω 
Wireless Type:Bluetooth 
Bluetooth:4.1 version 
wireless range:10m 
Bluetooth protocol:HFP/A2DP/HSP/AVRCP 
Net weight:6.5 g 
Size:5.6X1.0X0.8 cm 
Bluetooth Chip: CSR8610​