Exit Sign, Letter Color Red, Number of Faces 2, Directional Indicators – Emergency Lighting and Exit Signs Universal Field Selectable Chevrons, Lighting Technology LED, Housing Material – Emergency Lighting and Exit Signs Aluminum, Housing Color – Emergency Lighting and Exit Signs Black/Silver, Emergency Back Up Battery Yes, Battery Chemistry Nickel Cadmium, Voltage – Emergency Lighting and Exit Signs 120/277, Number of Lamp Heads 0