The ES626 and ES634 range of Trimec keypads are complete single-door self-contained access control systems for up to 200 users. Designed to US military specifications for shock, vibration, temperature, and high impact, these high-quality keypads contain the latest in "Piezo" technology. The sensors embedded below the metal surface of the keys on Piezo keypads are made of a ceramic alloy that only needs capacitance to activate. Two versions are available: a simple to program stand-alone single door controller for 200 users and a 26 bit Wiegand protocol keypad.