DOOR HANDLE ALARM - This door handle alarm is an extremely powerful deterrent for any would-be criminals. This security product emits a 125dB siren when activated, making any intruder rethink their intentions. LIGHTWEIGHT, PORTABLE HANGING BURGLAR ALARM - Lightweight and portable, the burglar door alarm can be taken anywhere and used in any property, or on any front door. Ideal for use while travelling or staying in hotels on the go. EASY TO USE MOTION SENSOR HANDLE ALARM - No installation required, simply hook onto the back of any door handle. This design is mainly for metal door handles. FULLY CUSTOMIZABLE DOOR ALARM SETTINGS - This hanging door alarm has functionality and sensitivity adjustment, allowing you to choose the mermaid setting. The door alarm also has a convenient exit delay so you can set it before you leave. Note: Batteries are not included, batteries must be purchased separately