70 mm Stack Light, 0.5 in. NPT Base, Black Housing, 24V AC/DC, Steady LED Module, Level 1: Green, Multi Function LED Module, Level 2: Blue , Multi Function LED Module, Level 3: Amber, Multi Function LED Module, Level 4: Red, One Circuit Sounder Top, Level 5: None Sound Only, No Level 6 Module, No Level 6 Color, No Level 7 Module, No Level 7 Color