Qomo 500 series radio frequency audience response system 2432 students qomo qrf524 this 500 series radio frequency audience response system for 24 students from qomo is a powerful system which can be used in traditional classroom settings group meetings or wherever instant feedback is desired the qrf 500 system lets you engage participants in virtually any situation thanks to a wealth of excellent features like the lcd screen and full alpha numeric keypad making it easy and fun to lea