Polycom SoundStation. Display: LCD, Display resolution: 248 x 68 pixels. Frequency response: 300 - 3300 Hz, Dynamic range: 85 dB. Supported network protocols: IETF SIP, RFC 3261, RFCs. Input voltage: 110 - 220 V, Input frequency: 50/60 Hz. Dimensions (WxDxH): 311 x 368 x 64 mm, Weight: 800 g