| Device is connected to computer. | Green indicator is lit. |
| Battery is charging. | Blue indicator blinks. |
| Battery is fully charged. | Blue indicator is lit. |
| Unable to start measurement; error. | Red indicator is lit. |
| Measurement has started. | Green indicator is lit together with a start sound ♫ |
| Measurement is running. | Green* indicator blinks every five seconds. |
| Measurement has ended. | Three ♫ ♫ ♫ beep-sound indications. |
| Pushbutton is pushed during measurement. | One ♫ beep-sound indication. |
| Battery is running low. | Blue indicator blinks twice and two ♫ ♫ beep-sound indications every five seconds. |
| Internal memory is almost full. | Orange indicator blinks twice and two ♫ ♫ beep-sound indications every five seconds. |
| Lead-off alarm (when lead-off detection is active) | Red indicator blinks twice and two ♫ ♫ beep-sound indications every five seconds. |
| Device is in Bluetooth idle state. | Green* indicator blinks every two seconds. |
| Firmware update. | Green indicator blinks during update. |
| Device reset. | All indicators blink once and one long ♫ beep-sound indication. |
| Device has halted at internal error handling checkpoint. | All indicators blink. |