Polycom CX200 Desktop Phone. Frequency response: 30 - 20000 Hz, Dynamic range: 80 dB, Total Harmonic Distortion (THD): 0.08 %. Input voltage: 5 V. Dimensions (WxDxH): 190.5 x 50.8 x 19.1 mm, Weight: 1100 g, Handset weight: 210 g. Package weight: 1100 g. Operating temperature range (T-T): -10 - 40 °C