When you turn it on there is a red blinking light, this will continue to blink for about 10 seconds which allows you to set it and move around before it is armed. Once the light stops blinking it is ready. Hang the alarm on the door handle. When someone opens the door or touches the door handle, the alarm will send out 120dB alarm volume to prompt someone to invade. The alarm sound can be heard outside 500ft
‌Door Handle Alarm‌ – Hang on any door to activate protection. ‌Triggers 120dB alarm‌ when door is opened/tampered with, ‌audible up to 550 ft/170 m‌.
User-Friendly Modes: Selectable alerts (Off/Alarm/Doorbell). Doorbell mode ideal for monitoring children/patients with Alzheimer’s/dementia; Alarm mode protects property and personal safety.with 3 sensitivity levels (high/medium/low).
Hassle-Free Setup: Door stop alarm– No WiFi or complex installation. Powered by 3 AAA batteries (not included), simply hang the alarm on the inside of your door handle.
Universal Compatibility:Hotel door alarm-Fits most handle-style doors/windows. Perfect for homes, rentals, hotels, dorms, shops, warehouses.,Essential travel safety accessory.
Note: Pack of 2 door knob alarm;The red light flashes for approximately 30 seconds before turning off, indicating the alarm is activated. Which is a normal phenomenon, in order to prevent false alarms caused by the installation process