The Mobile PBS is used as both a point of sale and a basic controller for the Kesseltronics r-TC Car Wash Tunnel Controller. This app is intended to be used by an attendant at the car wash. It will give the attendant the ability to sell car washes by selecting wash packages and options. Cars waiting to enter the wash can be moved up or down in the queue or even deleted. The app gives the attendant control of basic operations of the car wash such as starting the conveyor and calling up rollers