DOOR HANDLE ALARM - This door handle alarm is a super strong deterrent for any potential criminals. This security product emits a 125dB siren when activated, making any intruder reconsider their intentions. LIGHTWEIGHT AND PORTABLE HANGING INTRUDER ALARM - The Intruder Door Alarm lightweight and portable can be taken anywhere with you and used in any property on any door. Ideal for use when traveling or staying in hotels on the road. EASY TO USE MOTION SENSOR HANDLE ALARM - No installation required, simply clip on the back of any handle of gate. This design is primarily for metal door handles. FULLY CUSTOMIZABLE DOOR ALARM SETTINGS - This door hanging alarm has functionality and sensitivity adjustment so you can choose the setting of Mermaid. The door alarm also has a convenient exit delay so you can set it before you leave. Note: Batteries are not included, batteries need to be purchased by yourself