Summary. Remote PowerPoint presentation controllers (clickers) are very useful for teachers, instructors, professors, or anyone giving presentations. For unknown reasons, these units are currently selling on Amazon for 80% to 90% off their retail pricing. Read on to find out more. Wireless controller units have many applications including: Boardrooms and corporate meetings Classroom lectures Tradeshows… Continue reading PowerPoint Control Clicker and Laser Pointer Reduced Pricing for SMK-Link RemotePoint Emerald Wireless and VP4150