The Corby Digital Key consists of a 12 digit keypad and an on board electronics module. The Digital Key requires a four or five digit access code to be pressed in an exact order. Unlike other imitators, the Corby Digital Key uses true "Out of Sequence" error detection that demands exact entry of the operating code. Any deviation from the correct sequence instantly resets the unit. More than 95,000 different code combinations are possible with the Corby Digital Key because of the twelve digit keypad. Digital Keys that use less than twelve digits cannot provide the same level of security.