Philips SpeechMike Pro. Frequency range: 200 – 6,000 Hz. Weight: 0.155 kg. Minimum RAM: 64 MB, Minimum hard disk space: 75 MB, Minimum processor: Pentium II 233 MHz. Dimensions (WxDxH): 43 x 155 x 30 mm, Minimum system requirements: USB, Compatible operating systems: Windows 2000, XP