What do the LED light indicators on my Helio Strap signify?

The LED lights on your Helio Strap indicate different states. A flashing red light means the device is turning on or the battery is low. A flashing blue light during charging indicates the battery is between 20% and 80%. A flashing green light means the battery is between 80% and 100% while charging, and a solid green light means the battery is fully charged.