Dear Manager:
  sound pickup PK-501D from China Powerking.

	Product Name:sound pickup PK-501D Product S/N:120309100 Spec:sound pickup Product Memo:The installation of hidden Product Class:99.CCTV Accessories
Product Description: ¡́The installation of hidden  ¡́high sensitivity  ¡́Power polarity protection circuit 50~120m2 Impedance of 600 ohms   Frequency 50 ~ 13Khz   6 ~ 14VDC power supply   Siz 7*39mm

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