1. Penetrating strong, cement walls, steel walls,wooden wall, iron wall, glass, hollow brick walls, etc. can get.
2. High-sensitivity metal detectors, so that you fully grasp the voices of the next room;
3. With headphones and audio output hole, tape recorders can be synchronized with the audio in general is essential equipment to collect evidence;
4. A choice of four voices ABC D band, respectively, for A (whole tone), B (high) C (bass) D (one sound), depending on the situation so switching;
Note:
Insert sound detector "to detect the first connecting hole" on power supply, the volume will be transferred to the appropriate detectors in the two-dimensional objects, the headphones can hear the voice of the environment, you can use the "Audio Select" to select the desired to hear the audio models;
Such as high audio headset echo issue, you can change the volume or bass side "audio options" to stop it;
If you need a sound recording of audio cable, plug one end in the machine "REC" plug the other end of the MIC in the tape recorder to;