A connector is a device used to establish circuit connections and transmit signals, power, or data. The following are some common connector products:

1. USB connector: used to connect computers and external devices (such as keyboards, mice, printers, etc.) for data transmission and charging.

2. HDMI connector: High definition multimedia interface used to transmit audio and video signals between devices such as televisions, monitors, and audio systems.

3. D-sub connector: also known as D-subminiature connector, used for signal transmission and power connection between electronic devices.

4. Connecting terminal: used for connecting cables and wires, providing electrical connection and fixation functions.

5. Circular connector: It has a circular appearance and is connected by insertion and rotation, commonly used in aerospace, military, and industrial applications.

6. Radio frequency (RF) connectors: used for wireless communication and high-frequency signal transmission, commonly including SMA, BNC, N-type, etc.

7. Header Connector: used to connect electronic devices and circuit boards, providing multiple pin connections and communication functions.

8. Adapters and converters: Used to connect different types of connectors or convert devices with different signal formats.

9. PCB connector: used to connect electronic components on a circuit board, including sockets, plugs, pins, wiring terminals, etc.

10. Fiber optic connector: used for connecting optical fibers and transmitting optical signals and data.

This is just a small part of the connector product, each type of connector has a different design and purpose. Choosing an appropriate connector requires consideration of factors such as connection requirements, signal type, environmental conditions, and equipment compatibility.