Wireless & wired classroom lockout buzzer systems using quiz-master, crowd control games software and izimix. Classroom clickers systems use quizmaster which is integrated with PowerPoint and is compatible with both 32 and 64 bit. Standalone version no computer required. Our lockout buzzers and respone clicker systems are being used around the world for staff training, classrooms, universities, wedding events, company party planners and corporate event planners. When player's buzz in, locks out all but the first player to buzz in first. Your player’s names are displayed on your computer and projected for viewing by audience.