Wedge door stopper alarm with 3 sensitivity settings - high, medium and low. Emits an ear-piercing 120dB alarm to provide security and an effective deterrent to intruders and opportunist thieves. Sensitivity can be adjusted to avoid false alarms. Ideal for use at home, workshop, garage and also dorm rooms and hotels. Easy and effective way of protecting yourself and your belongings, providing security and peace of mind. Compact design for discreet positioning at entrance points. Can also be used as a traditional door stop when switched off. Cost-effective and more comprehensive than a traditional alarm system. Requires 1 x 9V (PP3) battery. Features: Wedge-shaped portable alarm system emits a powerful, ear-piercing 120dB alarm when placed at the base of any door and the door is opened. Provides security and peace of mind at home, in dorm rooms and hotels when travelling. Adjustable sensitivity. Compact design for discreet positioning at entrance points. Requires 1 x 9V (PP3) battery 1