FULL RANGE 2.0 GAMING SPEAKERS: Optimized drivers built for full range sound and extreme clarity. CUSTOM 3″ WOVEN GLASS FIBER DRIVERS: Producting a tighter sound with higher frequencies, allowing you to hear distinct layers and audio details. REAR-FACING BASS PORTS: Deliver increased bass output for a fuller, richer range of audio. BASS KNOB WITH AUTOMATIC GAIN CONTROL: Fine-tune the output perfectly—from ground-shaking bass to a low hum for late night sessions. SYSTEM REQUIREMENTS: PC/Mac with a free USB port, razer synapse requirements: Windows7/Mac OS X 10.9 (or higher), internet connection: 100 MB of free hard disk space. Use with either 3.5mm jack or USB (Speaker will not work with both plugged in).