Door Stops by InfantLY Bright. Details:Description: New door stop safety travel home portable anti-theft sensor alarm 120dB This is a new type of stainless steel door stop alarm. Features: 1. 2. Stainless steel cover, small size. A wedge-shaped alarm prevents intruders from opening the door. 3. The adjustable sensitivity switch can prevent tampering. Powered by a 9 volt battery (not included). 4. It has three sensitivity levels and super noise. When activated, a continuous 120 dB high tone alarm will sound. 5. Easy to operate, just put it under the door. It is an effective way to prevent intruders. small and can be stored in travel bags, briefcases or wallets. Great for family, office and travel. Specifications: Equipment: access control alarm Function: 3 sensitivity level Size: 14cm x 4.5cm x 4.0cm/5.51 x 1.77 x 1.