STURDY AND DURABLE -- This door security alarm is made of high quality stainless steel and ABS plastic, which is sturdy and durable, always protecting your safety. ADJUSTABLE SENSITIVITY -- There is a sensitivity controller on the side of the alarm, you can choose high/medium/low sensitivity. You can install it in the environment you want to install and adjust it to the appropriate sensitivity. NON-SLIP WEDGE DESIGN -- With its small size and non-slip wedge shape, this alarm security is suitable for all hinged doors. The bottom has a non-slip pad to increase friction and keep thieves and criminals out. HIGH-DECIBEL ALARM -- 120 dB high-pitched alarm, when someone is ready to invade the room, the alarm will sound, scaring off the intruder and calling back the owner and appropriate security personnel. Always protect your safety. WIDELY USED -- This door stop alarm is a secure alarm device, which is widely used for home, apartment, office or hotel. It is anti-theft, can provide you with security protection, easy to carry and convenient to use. Product Description PREMIUM MATERIAL The alarm of door stopper security is made of high quality stainless steel and ABS plastic, which is sturdy and durable, always protecting your safety. 120DB ALARM VOLUME There is has a sensitivity slider on the side to choose high/medium/low sensitivity. L: low sensitivity M: medium sensitivity H: high sensitivity (vibration alert) WIDE APPLICATION This door stopper alarm is a widely used secure alarm device for home, apartment, office or business. hotel. Specification: Condition: 100% Brand New Material: Stainless Steel, ABS Plastic Color: Black + White< /p> Battery: 6F22 9V battery Size: 14*4.5*4cm/5.5*1.8*1.6" Package weight: about 115g