The SM1-CF from ETS is a covert, omni-directional, lapel style, microphone with small form factor pre-amplifier. High performance, omni-directional pre-amplified microphone for use in covert applications. Small form factor microphone and pre-amplifier circuit board. Heat shrink protected, pre-amplifier board can be mounted with the affixed foam backed tape or left floating inside a wall or hidden in a ceiling. Connects directly to our switcher/ mixer/amplifiers or use one of our many interface products to make fast and clean connections to DVRs or remote monitoring equipment.