The proximity works by signal strength rather than distance. Bluetooth is prone to interference, so distance is never the correct measurement.

High Sensitivity (triggers when range bar is about 3 pink bars on the lock or 6 pink bars on the Card) and Low sensitivity (triggers when range bar is about 2 pink bars on the lock and 3 pink bars on the Card). 

Out of Range: The alert triggers when the devices disconnects from the phone by going too far away from it. You can select the timer on the sliding bar, which will trigger the alert, only after the time has elapsed. So 10s means that alert will trigger 10 seconds after your device has been out of range.

We recommend you use Low Sensitivity or Out of Range Mode. The range cam be affected by many environmental factors plus your phone's Bluetooth antenna. So we suggest you start with Low Sensitivity mode and then if needed turn on High Sensitivity Mode.

When the Alert Triggers, Press the right button on the AirBolt to stop it ringing and click Snooze on your App.

NOTE: If you move away and closer quickly, the alert can sometimes trigger when the AirBolt is near you as it takes the average value over a certain amount of time. 

Furthermore, your app must at very minimum be running in the background for Proximity/Separation Alerts to work.