# Other alarms

Last updated:

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October 18, 2026

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\| 1 minute read

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Receive alerts for environmental changes such as entering or exiting tunnels and transitions between day and night.

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## Get notified for tunnel events[​](#get-notified-for-tunnel-events "Direct link to Get notified for tunnel events")

Set up notifications for entering and exiting tunnels using the `AlarmListener`:

```dart
AlarmListener alarmListener = AlarmListener(
    onTunnelEntered: () {
        showSnackbar("Tunnel entered");
    },
    onTunnelLeft: () {
        showSnackbar("Tunnel left");
    },
);

```

***

## Get notified for day and night transitions[​](#get-notified-for-day-and-night-transitions "Direct link to Get notified for day and night transitions")

Receive notifications when your location transitions between day and night based on geographical region and seasonal changes:

```dart
AlarmListener alarmListener = AlarmListener(
    onEnterDayMode: () {
        showSnackbar("Day mode entered");
    },
    onEnterNightMode: () {
        showSnackbar("Night mode entered");
    },
);

```