blu PRO® Kit
How do I know my blu PRO® Rechargeable Device is charging and is fully charged?
When fully charged, the battery tip will blink red and then turn blue. After charging, both the battery button and LED tip will blink 20 times before the device shuts down. Once your blu PRO® Rechargeable Device is connected to a USB-compatible device, the button and LED tip of the battery will blink three times and stay lit to show the battery is charging.