Fire Extinguishing Ball is a fully automatic fire extinguisher. When throw into or rolling to fire, it will explode and make huge noise to catch everyone s attention nearby. You can also place it where the are such as flammable objects, circuit breaker box and gas tank. In case of fire, it will put out the fire by itself thus guarding lives and property. Shape: Ball Type Instruction: Fixed position by automatic fire sensor and / or throw in fire area Ignition: Automatically explode within 3-5 seconds after touch of fire Content: Environmental harmless dry powder Validity: 5Years Automatic reaction time: 3-5Seconds (3-5seconds) Effective extinguish area: (A) 1KG-3cubic meter As the specialized fire extinguisher ball manufacturer, we can service you well.