Product S/N:120308238
Spec:sound pickup
Product Memo:black shell
Product Class:99.CCTV Accessories
¡́Pinhole in the acoustic
Pillar
high sensitivity
¡́Power polarity protection circuit
50~120m2 Impedance of 600 ohms
Frequency 50 ~ 13Khz
6 ~ 14VDC power supply
Siz 13*50mm