Establishments primarily engaged in packaging, repackaging, and bottling of purchased chemical products, but not engaged in manufacturing chemicals and allied products, are classified in Wholesale or Retail Trade industries.
A phone connector, also known as phone jack, audio jack, headphone jack or jack plug, is a family of electrical connectors typically used for analog audio signals. The phone connector was invented for use in telephone switchboards in the 19th century and is still widely used. The phone connector is cylindrical in shape, with a grooved tip to retain it. In its original audio configuration, it typically has two, three, four and, occasionally, five contacts. Three-contact versions are known as TRS
Mic and Line cables. A balanced cable with a male XLR connection and one end and a female XLR at the other is often refered to as a mic cable, because it is commonly used to connect microphones to mixers. An unbalanced cable with a phone connector at each end is often refered to as a line cable.hone connectors. There are two types of phone connector: stereo and monaural. Stereo phone connectors are also called TRS phone connectors. They are used to handle stereo signals for headphones, as well as to insert effects.