High Quality Single channel smart USB record box answering machine auto answer device

The transponder is evolved from the radar IFF system developed by the British Air Force and the United States Army Air Force in the Second World War. In the 1950s, the aviation industry began to use secondary radars to coordinate with transponders for air control of general aviation and commercial aviation.

The core and magnetic tape of the tape recorder are easy to be damaged, and the tape needs to be fed and rewinded repeatedly when querying, so it can not be retrieved quickly. Therefore, this answering machine is not convenient to use and has poor reliability.

The former is a paragraph said by the owner of the telephone for automatic response to the caller; The latter is a paragraph said by the caller for the host to listen to. The "host message" will be used repeatedly after it is recorded. When the telephone rings several times (usually four times), the answering machine will automatically work. First, connect the phone and play the "host message" and then emit a "beep". The answering machine will record the caller's voice, and the other party will automatically stop when hanging up, and then prepare for the next answer.