Bartec MC92-NI Alternative Keypad-43 Numeric 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 43 Numeric Keys- (F) Function Keys, Approved in Combination with MC92NOex Series, Compatible with MC9090ex Series, can be changed in the Safe Area.