The Cooper Wheelock E50-241575W-FW is a white speaker strobe with a candela rating of 15cd (75cd on axis), input voltage of 24 VDC, wall mount and FIRE printed in red.
The Wheelock Series E50 Speaker Strobes feature high efficiency sound output, with dual voltage (25/70 VRMS) capability and field selectable taps from 1/8 to 2 watts. They are designed to provide a sleek, aesthetic appearance for emergency voice/alarm communications systems. All Series E50 models mount to standard 4" x 2-1/8" electrical boxes (with no extension ring required) and incorporate a speaker mounting plate for faster installation. The grille cover snaps on so no mounting screws are visible.