Creative Labs SB Tactic 3D Alpha. Device connectivity: Wired, Device interface: 3.5 mm, USB. Ear coupling: supraaural, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone frequency: 80 - 14000 Hz, Microphone sensitivity: -41 dB, Microphone connectivity: 3.5 mm. Minimum RAM: 512 MB, Minimum processor: Intel Pentium 4, AMD / 1.6 GHz. Minimum system requirements: USB port, Compatible operating systems: Windows 7/Vista/XP; Mac OS X v10.5