The LED indicator signals the different modes of your headphones are in per the descriptions below:

Red (Continuous) - Indicates battery charging.
Blue (Blinking) - Indicates pairing mode, waiting to pair.
White (Continuous) - Indicates battery fully charged and connected to a USB power source.
White (Blinking) - Indicates waiting to connect.
White (10 Second Interval) - Indicates headphones are connected and switched on.
No light display - Indicates Headphones are off or in normal operation .