Features School and Factory Bell Control: The Timer Switch is designed to efficiently control school or factory bells, providing precise timing for bell ringing schedules, enhancing operational efficiency and organization. Easy Installation: Utilizing the din rail-mounted method, this Digital Timer Switch can be effortlessly installed, saving time and effort for the user. Flexible Ringing Time Settings: With the ability to set ringing time from 1s to 99s, this Programmable Timer Switch offers customizable options to suit different timing requirements, providing versatility and convenience. Space-Saving Design: The compact and portable nature of this Timing Switch allows for easy integration into any space, effectively saving valuable installation space and maintaining a clean aesthetic. High Precision and Anti-Interference: Equipped with a high-quality chip, this Time Switch ensures high precision timing and strong anti-interference capabilities, guaranteeing reliable and uninterrupted performance. Specification: Item Type: Timer Switch Function: Bell Time Control Minimum Setting Time: 1min Working Voltage: 220V 50/60Hz Timing Error: ≤1s/d Rated Operating Current: AC-15 220V 3A Thermally Stable Current Value: 16A Ringing Time: 1s~99s Installation Method: Din Rail Type Package List: 1 x Time Control Switch 1 x English Manual Package List 1 x Time Control Switch 1 x English Manual