When charging can not open the machine, to see the Bluetooth headset inside there is no electricity.
If there is no electricity, it can not be turned on just after charging, check the indicator light when charging.
If it is fully charged, or has been charged for more than half an hour, then unplug and start to try.
If you still can not open the machine, it should be the Bluetooth headset battery is damaged, it is recommended to contact the after-sales.