SanJie Door Left Open Alarm with Delay(Instant/30s/1min/2min/4min),Window Fridge Door Alarm for Kids Safety,Volume Adjustment Mute-120dB,2 Tones,5 Modes,Ajar Alert for Freezer Garage Home,3 Sensor 3 Sensors music_Aug2024_update so keep the phone is

so keep the phone is near to the controller to receive signal

6RWeight: Approx

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SanJie Door Left Open Alarm with Delay(Instant/30s/1min/2min/4min),Window Fridge Door Alarm for Kids Safety,Volume Adjustment Mute-120dB,2 Tones,5 Modes,Ajar Alert for Freezer Garage Home,3 Sensor 3 Sensors music_Aug2024_update so keep the phone isSanJie Door Left Open Alarm with Delay(Instant 30s 1min 2min 4min),Window Fridge Door Alarm for Kids Safety,Volume Adjustment Mute 120dB,2 Tones,5 Modes,Ajar Alert for Freezer Garage Home,3 Sensor Product Features Door Alarms When Opened: The door alarm sensor features both instant and delayed alert functions. It offers two ringtones: Siren Alarm Chime: di di di. It alerts you when the door is opened or door left ajar, for total peace of mind at home