Zoom 56K Faxmodem. Modem speed: 56 Kbit/s, Type: V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22A/B, V.22, V.23, V.21, Bell 103/212A. Dimensions (WxDxH): 146 x 112 x 28 mm. Certification: FCC Parts 15B, 68 UL, C-UL CE RoHS