1) It offers the greater receiving range and higher response speed to avoid the omission of the signals.

2) the receive radius > 10 m.

3) the response speed: 30 m/s.

4) It offers the memory functions of the signal picking.

5) It offers the intelligent judgment function, which realizes the accurate identity of the interference signals and the effective interference rejection.

6) It offers the lithium batteries as the power for more than 150 hours of continuous working. It can be repeated charge 500 times.

8) It offers the same inner diameter as the connecting channel.