You give your kid a house key. The kid loses the key. The kid can't do his homework.
The kid flunks biology. The kid misses out on Medical School.
Fifteen years later the kid still lives at home. It could happen. Better buy a

Features & Benefits :-

• Universal Use
  Compatible with all garage door openers
  (connects to same terminals as the internal wall control pushbutton)
  

• Easy Programming
  System is quickly programmed in three simple steps.
  

• Tamper Proof 
  The keypad shuts off for one minute after five wrong entries have been pressed and cutting the cable to the inside control box or 'shorting' the wires from the external keypad will not activate the opener (the decoding is done within the internal control panel which is located inside the garage separately from the keypad)
  

• Weatherproof Flip-up Cover
  Design protects the unit against the elements.
  

• Personalised User Code
  A one to six digit code may be chosen to provide up to 1,000,000 possibilities.
  

• Back Lighting
  Illuminated keypad for easy night-time operation.  Additional indicator light provides verification as keys are pressed.
  

• Low Power Warning/Battery Saver
  Lights dim to indicate batteries should be replaced soon. Special sleep circuitry conserves battery life.

• Instant Stop
  After code is entered and garage door opener is activated, the 'enter' key may be pressed again to stop or reverse the door, without re-entering the code. The 'enter' key remains active for 20 seconds.

• Additional Push Button
  Conveniently located on control box allows door operation from inside garage.
   

• Five year manufacturers warrantee option
  
  

Specifications: Outside Keypad Size: Length 5" (12.5cm); Width 2" (5cm); Depth .6" (1.5cm). Inside Control Box Size: Length 3" (7.5cm); Width 4.5" (11.5cm); Depth 1.4" (3.5cm). Materials: ABS plastic; Elastomeric silicone keypad. Electrical Input: 3 AA Duracell alkaline batteries. Electrical Output: 1 amp dry contact relay giving a 0.3 – 3.5 second activation.	Keypad (outside) internal control panel
	DOMINO keyless digital entry system package includes Domino keypad, control box, three AA batteries, four #4 x 3/4" screws, and installation instructions.