Hamlet HV92KX2 External Modem Fax RS232 Serial Interface. Modem speed: 56 Kbit/s. Maximum fax transfer rate: 14.4 Kbps. Compliance industry standards: ITU-T V.92, V.90, V.34, V.32 bis, V.32, V.22 bis,V.22, V.23, V.21, Bell 212A, Bell 103. Dimensions (WxDxH): 134 x 85 x 28 mm, Weight: 0.165 kg. Certification: FCC part 15, part 68, CE V.1.0