Bartec MC92-NI Alternative Keypad-53 Alphanumeric Keys is certified for ATEX Zone 2 and Zone 22, IECEx,UL Class I Division 2, UL Class II Division 2, UL Class III which makes it suitable for use in the Ex Area, Spare Keypad with Green Overlay, Keypad with 53 Alphanumeric Keys, Approved in Combination with MC92NOex Series, Compatible with MC9090ex Series, can be changed in the Safe Area.