Polycom SoundStation2 Direct Connect for Nortel. Display: LCD, Display resolution: 132 x 65 pixels. Voice codecs: IEEE 1329-1, Frequency response: 300 - 3300 Hz. 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 Part 68, FCC Part 15 Class A, Canadian ICES-003, CE Mark (R & TTE)