... number, exhale number, etc.It is designed by YX Co.,LTD,with FSK and DTMF.And the recorder support compressed format ... less hardware, and have senior management functions, anytime retrieval, any time play, very easy to storage, compress, move, delete, backup ... type any words you like into the log system. Search, import & export data, manage conveniently.a. User Loginb. Software Interfacec.Group ...