Use methods1. Intelligent sensor light, which can automatically sense the presence and absence of light according to the , and can be set appropriately according to the needs of the occasion when used:If you to start spraying in the light period, adjust to the "day" gear;If you to start spraying in the dark period, adjust to the "night" gear;If you to spray 24 hours, adjust to the "24h" gear.2. The interval of automatic spraying can be set:2 / 2--The fan rotates for 2 minutes and stops for 2 minutes;5 / 15--The fan turns for 5 minutes and stops for 15 minuteson--The fan keeps turning;off--The machine is not working.Power supply: 2 * AA batteries (not include)Type: automatic air freshenercolour:whiteMaterial:plasticsize:215*91*80mmPackage Contents:1 * automatic air freshener1 * ManualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.