Knock three times on the ceiling--or in this case, the keypad. Israeli company E-lock has developed a device that can open locks with a quick series of discrete mechanical knocks. Just press the gadget to the outside of the door or lock, enter a personal security code and voila, you're in. The idea here is greater security: Since there are no keyholes or contact points, locks can't be picked or tampered with.
Each KnocKey can be programmed to open up to 100 different locks using varying encrypted codes, according to the company. A mounted KnocKey can be attached … Read more