Ciata Lighting All LED Decorative Red Exit Sign & Emergency Light Combo with Battery Backup Long-lasting, energy efficient red led exit sign illumination Unique bi-color led indicator light alerts occupant on battery condition Internal solid-state transfer switch automatically connects the internal battery to led board and led lamp heads for minimum 90-minute emergency illumination Fully automatic solid-state, two-rate charger initiates battery charging to recharge a discharged battery in 24 hours Ez-snap thermoplastic mounting provides top or end mount