Features: 1. Plug and Play. It is suitable for 10/8.1/8/7. 2. For GRIS fax cats can dial the Internet, and send and receive faxes, but do not support voice calls. 3. The 56k data/fax modem uses USB2.0 Type A with a full speed of 56kb/s. 4. Comply with V.92, V.90, and V.42, V.42bis/MNP5 protocol. Meets V.17, V.29, and V.27ter Group 3 fax protocols. 5. Support automatic dialing, tone, and pulse dialing, automatic answering, and automatic fax sending and receiving. 6. Support caller ID, automatic format/speed sensing, data/fax/voice call, single profile stored on the host, call forward/backward. 7. Up to 56k data download, 48k data upload, and 14.4k fax communication. 8. Compatibility: Standard and expanded AT command set compatibility. Provides fast connection and maintenance function on the modem.Specification: Type: Normal Dial-up Modem Category: External type Interface Type: USB Telephone Line Connection: RJ11 Transmission Rate: 56Kbps Bus-powered USB Device: 5V Transmission Protocol: V.90/K56flex Fax/Protocol: V.17, V.29, Group 3, Class 1 Main Function: Dial the Internet, automatically send and receive faxes Operating System: For Windows 7/8/10 Compatibility: Compatible with AT and extended AT command sets