The VDV MapMaster 3.0 Network y Coax Cable Tester Field Kit from Platinum Tools combines continuity testing, mapping, generating tones, and length measurement functions into a single easy-to-use unit for installation, troubleshooting, and maintenance for telco, network, or coax cable. The backlit display, glow-in-the dark keypad, and a built-in flashlight helps you to work in the dark. Whether your jobs are commercial or residential, the versatility and added features of the VDV MapMaster 3.0 make it a value cable verifier for the professional installer.