How to Charge
If you can see the LED rapidly flashing RED, you will need to charge the CK121. After flashing RED for a while, it will automatically power off.
Instructions:
Insert the micro USB (smaller) end into the charging port on the CK121 and the USB end into a power source. You can either use the included charging cord or any USB to micro USB cable to charge.
Indicators:
The LED will be RED while it is charging and turn off when charging is complete. You are still able to use the CK121 while it is charging.