Ultra-Bright, Energy Efficient, Long-Life Red or Green LED. Dual 120/277 Voltage. Charge Rate/Power “ON” LED Indicator Light and Push-to-Test Switch for Mandated Code Compliance Testing. Long-Life, Maintenance-Free, Rechargeable NiCd Battery. Internal Solid-State Transfer Switch Automatically Connects the Internal Battery to LED Lamp Heads for Minimum 90-minute Emergency Illumination. EZ-snap mounting canopy included for top or end mount.