Double side Plastic frame

This product is made of  fire-retardant materials, with battery protective circuit for progressive constant current charge, troubleshooting, overcharge and overdischarge protection. It is provided with EL panel of extremely low power consumption for illumination and non-corrosive nicad battery as emergency power supply, which is durable and convenient for maintenance and saves energy. It is designed under standard GB17945-2000 and is widely used as firefighting indicator in the corridor and stair of shop, hotel, cinema and basement for emergency dispersion in case of fire.