Details: Using the step: 1.Wash and dry the teeth surface water with teeth wipes. 2.Clean the blue teeth whitening light with warm water, and dry it with tissues. 3.Place a small thin line of gel with the syringe on the mouth tray. 4.Plug it into your cellphone, tablet or any USB to power the whitening device. 5.Place carefully tray into mouth, avoiding gel leaking into gums.
Package Dimensions: 9.6 x 6.2 x 2.2 inches