Adjust induction switch:

a: 24 Hours, spray once every 5/10/15/20/25 minutes. (if you choose a, it will work 24 hours)

b: Ningt, without light, spray once 5/10/15/20/25 minutes. (if you choose b, it will work only in night time)

c: Day. With light, spray once 5/10/15/20/25 minutes. (if you choose c, it will work only in day time)

Without light, it will not activate. 

Users can choose a, b or c to set up the air freshener.