ETS SM1-TR Tamper resistant Omni-directional pre-amplified microphone for use in applications where vandalism is of concern. Electretical element is mounted in a special housing which is out of reach to objects inserted in the sound holes. Applications include prisons, detention areas, public locations etc.

Product Details:

• Low noise MOSFET
• pre- amplifier. 
• Adjustable gain. 
• Line level unbalanced output. 
• Limiter circuit selectable on/off. 
• Easy cable run termination. 
• Power: 12VDC @ 10mA. 
• On-board voltage regulator 
• Optional surface mount adapter, SM1-S