Ordinary wall contact microphone not enough for your investigation????
Then we recommend our newest model. Its a multi functional wall contact microphone with 2 x needle mics and a 1 Metre external Mic(optional 25M Cable Available).
1. Highly sensitive metal stainless steel wall microphone.
2. Chrome plating mirror finished stainless body.
3. Equipped with hollow needle mic (2 different types of needles).
4. Optional 25m remote microphone
SIZE… Amplifier unit 21(23) x 55 x 70 (85)mm