You can select the spray time between 7, 15, and 30 minutes accordingly to place of use Features of the scent spray 1.By adjusting the timer, the aromatic will spray scent continuously at a desired time 2.Operated by battery, it does not require any additional electronic devices. 3.You can select the spray time between 7, 15, and 30 minutes accordingly to place of use 4.It will make the interior look better with its modern design. Qty per Carton:30PCS N.W/G.W:10.80/12kg /box 0.360kg/pc Loading Qty::12,000pcs/20' . 25,500pcs/ 40' For more information for your reference, please visit our website to following http://catalog.kita.org/cho7265