'Exit Sign with Battery Backup, Fixture Wattage 3.0, Lamp Type LED, Letter Color Red, Background Color Gray, Number of Faces 1, Housing Color Gray, Housing Material Aluminum/Acrylic, Mounting Universal, Voltage 120/277, Depth 1-3/4 In., Height 13-1/4 In., Width 15-1/8 In., Battery Type Nickel Cadmium, Emergency Illumination Time 90 min., Operating Temp. Range 32 Degrees to 100 Degrees F, Directional Indicators Chevron Directional Knockouts, Letter Size 1 In. Stroke x 8 In. High'