Slim Chicago Exit Sign - Single Face, Letter Color Red, Number of Faces 1, Directional Indicators - Emergency Lighting and Exit Signs No Directional Indicators, Lighting Technology LED, Housing Material - Emergency Lighting and Exit Signs Steel, Housing Color - Emergency Lighting and Exit Signs White, Emergency Back Up Battery Yes, Battery Chemistry Sealed Nickel Cadmium, Voltage - Emergency Lighting and Exit Signs 120/277 V, Number of Lamp Heads 0