Slimline, ultra-compact, low-profile. Charge rate/power on LED indicator light and push-to test switch for mandated code compliance testing. LVD (low voltage disconnect) prevents battery from deep discharge. Long-life, maintenance-free, rechargeable NiCd battery. Internal solid-state transfer switch automatically connects the internal battery to LED board for minimum 90-minute emergency illumination. Fully automatic solid state, two rate charger initiates battery charging to recharge battery in 24 hours. Universal surface mount, wall or ceiling, with EZ-snap thermoplastic mounting canopy. Ultra-bright, energy efficient, long-lasting red LED. Injection-molded, engineering-grade, V-0 flame retardant, high-impact, thermoplastic. Curved face, rounded corner design. 11-5/8" long x 7-3/16" high.