Usage Tips:Wireless Door Infrared Bell Alarm. Fits onto your shed, garage, barn door or window. For Shed Garage ,Caravan Security Keypad Alarm. Loud alarm signal: approx. 110 dB siren. Adjustable security pin code operation 3 x AA battery operated (not supplied) 3 settings: Instant, Delay and Chime Instant Setting: 110 decibel siren will sound immediately until security code is entered Delay Setting: 10 second delay to enter security code before 110 decibel siren is sounded Chime Setting: To alert you when a guest enters, or as a warning if a young person opens the door Process for Code setups: Set your own code by first pressing the unit's default code: " 0000 and x ", Now enter your own code by pressing for example: " 123 and x " To arm: press 123 and greater than red light comes on for 10 seconds To disarm: press 123 and greater than TWICE!! Red light then flashes for 10 seconds and the unit is closed down. Name: Alarm Working voltage: 4.5 V Scope of application: door and window anti-theft alarm Model: MM-1 colour:White Material:ABS Package Contents: 1 x Wireless Door Alarm(with installing wire) Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.