The Lithonia Lighting Basics? ECRG is a combination of exit and emergency lighting. The ECRG is ideal for safely illuminating the path of egress above-the-door in small spaces at lower mounting heights while providing 90 minutes of emergency power. Contains ability to switch between red and green letters. Features: The ECRG LED Exit Sign has an internal switch for red or green color selection Offered in the new bright white thermoplastic housing the EXRG has a classic design with updated features. This fully assembled single-face exit comes with an extra faceplate and red and green panel inserts for ultimate field configurability Dual-voltage 120/277 60Hz UL Listed Meets all applicable requirements for UL 924 NFPA 101 (current Life Safety Code) NFPA 70 (NEC) FCC Title 47 Part 15 Subpart B and OSHA Indoor damp location 50?F to 104?F (10?C to 40?C) listed Mounting pattern on canopy (top and side mount) and back plate (back mount) fits most standard size junction boxes Dimensions: Width: 4.33 H