USA SALES GROUP

AUDIO MICROPHONE HAS Qualitative Preamplifier used to increase a microphone's low output voltage to a stronger usable level. High Sensitive Audio Sound Pick Up. CCTV DVR audio microphone is guaranteed to work more than 5,000 hours... SURVEILLANCE MICROPHONE HAS High gain and auto level adjustment + sensitivity adjustment. Qualitative elements and the modern design of the microphone make it the leader in the US market.