Throwing Star LAN Tap is an Ethernet intranet data analysis device. Features immersion gold plating for fast transmission and reduced signal loss. This tool is designed for use with 10BASE-T and 100BASE-TX networks. Monitoring ports J3 and J4 are receive-only ports. Usage: 1. Connect the Ethernet cable to be monitored to J1 and J2 of the Throwing Star LAN Tap. 2. Connect an Ethernet cable to J3 or J4 of the Throwing Star LAN Tap; each port captures one direction of data communication. 3. Use network analysis software such as TCPDUMP or Wireshark to capture and analyze traffic on the connected workstation. Dimensions: 70mm x 70mm Color: Random (cannot be specified) Material: PCB and electronic components Package Contents: 1 x Throwing Star LAN Tap Note: The actual color may vary slightly due to lighting and display differences. Measurement error allowance is +/- 1-3cm.