1.[High Illumination & Material] Two fully 360° rotation adjustable, large and glare- LED lighting square heads with high lumen, super bright when they working, suitable for emergency lighting in all occasions, such as school, hotel, companies, supermarkets, restaurants, library, home, factories, etc. Made of high-quality materials, design with high quality, VO flame retardant, high-impact, thermoplastic, etc. 2.[Long Working Time & Long Lasting] Internal high quality Ni-MHAA 3.6V 1000mAh batteries transfer switch automatically connects the internal battery to led board and led lamp heads for more than 90 minutes emergency illumination. Input 277V / 120V (60Hz), 3W, fully automatic solid-state, two-rate charger initiates battery charging to recharge a discharged battery in 20 hours for charging. Long lasting for 50000+ hours. 3.[Certificate] commercial emergency lights passed the UL certificate. Suitable for damp locations, and quality are guaranteed. 4.[Easy to Installation] led comercial emergency light is easy to install, fits all requirments and building standard for the various installation. The emergency LED light with standard accessories and installation instructions inside to help you install smoothly.