working principle: 1. Set the time of the machine/product in advance, mechanically driven; 2. The battery inside the machine can work continuously for 80-100 hours under power failure; 3, the product is a 24-hour time switch, the minimum time set is 15 minutes; 4. The clock icon on the machine faceplate indicates the start of the set time mode; 5. The I graphic on the machine panel indicates the lock setting.
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