Hand-held coax mapping device designed to locate and identify installed wires and to test multi-run coax systems terminated with F-connectors. Use it to put a tone signal on a coax cable. Eight number-coded terminators allow you to test and identify EIGHT cables with just ONE trip to the junction box! Auto Power Off: 12 seconds after Pass/Fail results Maximum cable length for testing: 3000 feet Maximum DC cable resistance: 100 ohms Dimensions: 3-1/4" x 2" x 1-1/4" Weight: 4 oz (with battery) no toner function available. Battery included.