External Data Fax Modem 56K USB 2.0 | BL-UM03B-Interface: USB 2.0 (Type-A)-Telephone Port: RJ11-Data Protocols: V.92, V.90 (up to 56 Kbps download, 33.6 Kbps upload)-Fax Support: 14.4 Kbps fax mode-Error Correction: V.42, MNP 2-4-Data Compression: V.44, V.42bis, MNP 5-Operating Systems: Compatible with Windows 98, ME, 2000, XP, Vista, Windows 7, Windows 8, Windows 10, and Linux-Power Supply: Powered via USB (no external power adapter required)-Dimensions: Approximately 7.5 x 2.8 x 2 cm-Weight: Approximately 41 grams-Black-Brand: Other-Made in: China-Model: BL-UM03B-Ref: Other- BL-UM03B-296546-Unit: Pcs

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