The item shown is a Monoprice EZ Checker 008, a portable network cable tester used for troubleshooting continuity issues in communication cables.
Supported Port Types: F-connector (coaxial), RJ12 (telephone), and RJ45 (Ethernet).
Functionality: Tests for opens, shorts, and miswiring to verify cable integrity before or after installation.
Power Source: Operates on a 9V battery.