Wireless Infrared Door Bell Alarm. Fits your shed, garage, barn door or window. For shed, caravan security keypad alarm. Loud alarm signal: approx. 110 dB Siren. Adjustable Security PIN Code Operation 3 x AA Batteries (Not Included) 3 Settings: Instant, Delay & Chime Instant Setting: A 110 decibel siren will sound immediately until the security code is entered Delay Setting: Delay 10 seconds to enter the security code before the 110 decibel siren sounds Chime Setting: To alert you when a guest enters, or as a warning if a young person opens the door Process for Code Settings: Set your own code by first pressing the unit's default code: "0000 + * ", Now enter your own code by pressing for example: "123 + * " To Arm: Press 123 + greater than the red light lights up for 10 seconds To disarm: press 123 + greater than TWICE!! Red light then flashes for 10 seconds and the device turns off. Name: Alarm Working voltage: 4.5V Scope of application: door and window burglar alarm Model: MM -1