Lithonia Lighting Exit Signs • 120/277V 6 H letters with 3/4 stroke; New York Approved have 8 H letters with 1 stroke Universal mounting capability Knockout chevrons for choice of direction Ni-Cd battery unless noted Self-DiagnosticAutomatically run charging, battery condition, and AC-to-DC transfer tests for 5 min. every 30 days, and for 30 min. every 6 mo. Continuously monitor AC functionality. Additional features include low-voltage disconnect and brownout protection. With 2-state constant-current charger, multichromatic, multifunction status indicator, and interchangeable faceplate and back cover. LEDs operate in normal AC and emergency DC modes.Quantum SeriesImpact-, scratch-, and corrosion-resistant housing snaps together with no additional fasteners; UV-stabilized to resist discoloration.UL Listed. UL 94 V-O flame rating. Meet UL924, NFPA 101, NEC, and OSHA illumination standards. Exit Sign w/ Battery Backup, 0.71W, Red This product contains a chemical that is regulated under California Proposition 65. Warning This product contains a chemical known to the State of California to cause birth defects or other reproductive harm.