... , CE FCC 4, NK-K18 5, Super mini keyboards 1) MODEL: 18 Keys Waterproof MINI Number Keypad(NK-K18)2) Certificate: CE ... temperature between -40 to 80 degree.Applicable to the crowd: 1, such as designers, officers(referring to non-professional typists), love ... with high-temperature materials such as cigarettes and so on. 18 keys keyboard, silicone Number Keypad, mini keyboards