1、ABS Material: This second setting digital timer switch is made of ABS material with excellent craftsmanship, which can be used for a long time under normal operation. 2、Programmable 7 Days and 24 Hours Per Week: Our second setting digital timer switch can be programmed 7 days a week or 24 hours a day, which is very convenient for the operator. 3、Memory Backup: Our second setting digital timer switch has a built in removable battery for memory backup in case of power failure. 4、Auto Calibration Time: This second setting digital timer switch has an auto calibration time error of ±30 seconds per week, which you can match to the actual situation. 5、28 Kinds of Switch Repeat Program: With 28 kinds of switch setting repeat program and can do manual setting switch, if you have related needs, then this one is suitable for you.