Features<br> 1、DUAL RJ11 PORT: The USB data modem utilizes dual RJ11 ports for connecting two fax phone lines or a telephone at the same time. 2、SUPPORT CALLER ID: USB data modem adopts for Conexant93010 main chip, support Caller ID, compatible with AT and extended AT command set. 3、EASY TO USE: USB 56K external modem is easy to use and supports stable fax sending and receiving. 4、SUPPORT OS: Computer laptop fax modem supports for Windows 98/2000/xp/vista, for WIN7, for WIN8 , for WIN10, for WIN11,32/64bit, for LINUX operating system. 5、ANTI THUNDER: Dual RJ11 Port USB fax modem is protected by fast anti thunder defend circuit to enhance thunder resistance.<br> Specification<br> Item Type: USB 56K External Dial Up Fax Data Modem<br> Material: ABS<br> Main Chip: for Conexant 93010<br> Interface Type: USB<br> Transmission Rate: 56Kbps<br> Transmission Protocol: V.90/K56<br> Fax/Protocol: V.17, V.29, Group 3, Class 1<br> Main Functions: Unplugged Internet Access, Auto Send/Receive Faxes<br> OS: for Windows 98/2000/xp/vista, for WIN 7 8 10 11 32/64bit, for LINUX<br> Compatibility: Compatible with AT and Extended AT Command Set.<br> Package List<br> 1 x USB 56K External Dial Up Fax Data Modem<br> 1 x RJ11 Telephone Cable<br> 1 x Instruction Manual<br> 1 x CD ROM