Solid green light: The device is on without collecting data.
Flashing green light: The device is collecting data.
Flashing red light: The device is low on battery.
Solid orange light: The device contains stored data.
Flashing orange light: Stored data is being erased from the device.
Blue light: The device is charging correctly.
When the battery charge is complete, the blue light on the OLI will turn off.