Complex sentence: They connect to the PS2 or PS3 system via a USB dongle each dongle can support up to 4 wireless buzzers so this means another dongle is required for 8 player play with 8 wireless buzzers.
Split into simpler sentences: They connect to the PS2 or PS3 system via a USB dongle. Each dongle can support up to 4 wireless buzzers so this means another dongle is required for 8 player play with 8 wireless buzzers.