Universal Serial Bus 1.1 Standard, 12Mb/s, Compatible USB 2.0 Interface

Standard RJ-11

>50K Ohm

Standard 50 dB

300 - 3400 Hz

USB Port with Standard 5V Power Supply

DTMF（Dual Tone Multi-Frequency）&FSK（Frequency Shift Keying) Format

PCM, 8000byte/Second, 64KBPS；
1GbHard Disk = 1000Mb； 1Mb=1024*1024 = 1048576Byte；
1Gb = 1048576000Byte；
1048576000 / 8000 = 131072Sec / 60 = 2184.6Min / 60 = 36.4Hours
Approximately 1GB of Hard Disk Space can store up to 37 Hours of the 　　continuous conversation record file.