Polycom SoundStation2. Frequency response: 300 - 3300 Hz, Dynamic range: 94 dB. Input voltage: 110 - 220 V, Input frequency: 50/60 Hz. Dimensions (WxDxH): 311 x 368 x 64 mm, Weight: 800 g. Certification: NA Cl/C-UL FCC 68 FCC 15 B ICES-003 CE Mark R & TTE Directive VCCI B. Operating temperature range (T-T): 5 - 40 °C, Operating relative humidity range: 20 - 85 %, Storage temperature range (T-T): -30 - 55 °C