USB digital fax machine USB digital fax advocates green idea of environmentalism. It is paper-free. The well edited documents in computer can be faxed out directly without printing. Alll faxes received will be saved in an internal memory chip for personal edition. The chip is available to save around 200-pages,the recieved faxes will be uploaded to computer automatically,when you connected the fax to your computer,you can read ,mark,signature,sealed,erasure,backup,delete ,edit the file name,omve ,copy ,search and print. Similar size as cigarette box is easy for your carrying.Usb-Plug-Play,it's the best choice for modern office equipment. Main Functions:1.paper freeComputer operate interface ,no need paper for receiving and sending faxSended faxes and received faxed will be stored automatically2.Fax can be received when the computer is shut down3.Group sendingGroup faxes will be sent automatically and generated reports4. Automatic queuing or auto resendingWhen group sending ,the faxes sending task will be listed automatically. If send failure,U-Fax will auto resend5.Edit FaxRead,mark,signature,stamp,print6.Fax operate interface is similar as outlook express ,add folder optinal,supoort files backup,tranmit,research.7. SignatureElectronic signature and stamp by password (optional)on fax System:  Windows 98/Se,Me,2000, XP, Windows Vista