Description This rolling ball vibration switch is designed with dual steel balls for enhanced sensitivity, ensuring reliable detection of subtle movements in security applications. The normally closed ball contact vibration sensor offers stable monitoring and reduces false triggers. Its compact size allows easy installation in smart home and industrial electronics, providing a switch alternative NC vibration and supporting vibration activated relay switch NC functions. Features -Color:Golden -Material:Rubber, metal -Size:0.30X0.30X0.30cm/0.12X0.12X0.12in -Enhanced sensitivity: the double ball contact vibration switch uses precision dual steel balls, providing high sensitivity to small movements suitable for security devices or small appliances requiring instant alert -Stable monitoring: the normally closed ball vibration switch prevents false triggering, ensuring consistent vibration sensing and reliable performance for electronic and industrial monitoring systems -Compact design: this dual ball vibration contact switch fits easily into tight spaces, making it ideal for smart home or automotive applications -Reliable operation: the metal ball vibration switch utilizes a conductive ball design to ensure stable transmission, performing reliably even in harsh environments and continuous use -Safety: serving as an effective switch alternative, the normally closed double ball vibration switch is both safe for alarm and vibration control module installationsPackage list: 20 x Vibration sensor