1. No monthly fees and no internet required! 2. This wireless quiz buzzer version works without a computer. You have complete and direct control of the system with a provided Master Controller. 3. First player who buzzed in locks out the other contestants. 4. The buzzer light up and buzz invoice to identification of who buzzed in first. 5. Yellow, Green, Blue, Red and Black color optional. 5. Aluminum Carry case for 4, 6, or 8 buzzers with foam hole for each buzzer. 6. Range support 100 meters