1This product is designed in strict accordance with the GB17945-2010 standard. 2Can be installed in public places to cope with fires, earthquakes, and various outages that cause power outages. 3Function as indicator light, this light can help you out of the emergency smoothly. 4The shell is made of quality ABS flame retardant material, light weight and easy to install. 5One light for two uses, not only an escape safety indicator but also an emergency light. 6Built-in 800mah battery can even continuously light for about 90 minutes after power failure. 7Features with full intelligent automatic fault detection and sound and light alarm, safer and more practical in use.