Use methods 1. 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 spraying in the light period, adjust to the "day" gear; If you to 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 minutes on--The fan keeps turning; off--The machine is not working. Power supply: 2 * AA batteries (not include) Type: automatic air freshener colour:white Material:plastic size:215*91*80mm Contents: 1 * automatic air freshener 1 * Manual Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.