NO NEED FOR SPECIAL MAINTENANCE: - for a period of 5 years without the maintenance required always on guard for you with its unique capability to emit loud noise of 101 decibels as a fire alarm upon activation its lightweight and portable unit weight is only 1.5 kg all people can freely use composed of environmental harmless dry powder. people no longer need to be close to the fire scene, the environment completely harmless, and completely harmless to the human body. comes with a wall mounting bracket, and even it can operate manually also when a fire erupts. Suitable for use in the car, private home kitchen, factory, warehouse, electrical cabinets commercial purposes, etc. It covers s 360-degree angle, area of about 70 to 80 sq. ft. It can extinguish three classes of fire, Solid, Liquid, and Electrical classes Fire. It weighs 1.5 kilograms with packaging. The diameter of the ball is 144 mm, and it makes it easy to carry and use, its 100 percent eco-friendly, 100percent biodegradable. it has no wiring and no ducting, it has a long shelf life of 5 years, even kids can operate this ball.