This door alarm will ensure the peace you need at home or in your room. It is placed under the door and serves as both a wedge and lingering sound alarm. Everyone who tries to open the door would pull this little wedge and the alarm will start squeaking. The sound of over 120 dB force will startle any intruder and simultaneously attract others. The alarm works with 9V battery and has a three-stage switch span.
Door alarm (ID: D36)