We were the first to introduce our innovative touch sensor keypad technology, which combines the key function, indicator element (backlight using LED), and instrument panel into one seamless system. Our touch sensor keypads surpass the functionality of other keypads, as they can precisely sense and differentiate between specific touch locations using electrical impulses in the human body. For instance, if a user touches two keys simultaneously, our sensor will ignore the input, whereas other touch sensor keypads sense either the first key or both keys simultaneously, rendering them impractical. Additionally, our keypad can detect when a key is pressed and held down for several seconds.