Adjustable long lasting, efficient, ultra bright white LED lamp heads One 0.5W white LED per lamp head Unique all-inclusive lamp, reflector and lens assembly Dual 120/277 voltage Unique bi-color LED indicator light alerts occupant on battery condition (Green-normal, Red-check battery) 3.6V long life, maintenance-free, rechargeable Ni-Cd battery Internal solid-state transfer switch automatically connects the internal battery to 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 Surface mount back plate fits most standard size junction boxes and snaps into place Suitable for wall or ceiling mount UL Listed for damp locations (0°C – 30°C) Meets UL924, NFPA 101 Life Safety Code, NEC, OSHA, Local and State Codes 5-year Warranty Dimensions: 7-1/4"L x 2-3/4"W x 4-1/2"H