According to an aspect, a mobile electronic device includes an image projecting unit and a processing unit. The delivery system can be a chemical dispenser which can be attached to a plunger used in plunger lift operations, a plunger which has been impregnated with treatment chemicals, a plungerdispenser apparatus which has an interface section for interfacing with the inside of the tubing and a dispenser section. The two legs have slots therethrough configured to receive fasteners that, when secured to support members, secure and maintain the extension member in position.