Whiteningbrites gives 15 days trial. The time starts at point of order. Item is shipped to arrive 7 days after ordering. With time to try item and then send an email to them to request an RMA number for the return and time to mail items back after receiving RMA, There is not enough time to ever send back anything. I never did get an RMA after 2 e mails and 5 days. All calls were turned away to the email address for complaint. read full review »