Drive One 2 uses sounds and lights, both to notify of road issues, and to inform you of the device's status (ready to pair, connected, not connected)

Here you can see what the individual sounds and lights mean:

Status of Drive One 2

Green light blinks once - device beeps once

Drive One 2 is now awake and ready to be paired with the Drive One app on your phone

Continuous green light - multiple beeps from the device

The Drive One 2 device is now paired with the Drive One app on your phone

Yellow light - three beeps from the device

Drive One 2 is awake but cannot find a phone to connect with.

Tip: Make sure that your phone has Bluetooth functionality enabled.

Warnings from Drive One 2

Note: These are the default sounds from the device - you can change your warning sounds from the app if you wish.

Blue light and fast beeping sounds

A Drive One user has reported that there is a speed trap nearby so make sure you are driving within the legal limits.

Red light and siren sound

A Drive One user has reported that there is some kind of hazard nearby, so pay attention to your surroundings and the road.