Cable Length Meter For Use With Cables Consisting of At Least 2 Insulated Metallic Elements One of Which May Be The Sheath or Shield of The Cable Measures Feet Meters Function Uses TDR Technology to Measure The Accurate Distance of Cables Terminated with BNC or RJ45 Connectors Includes (2) AA Batteries BNC (M) B Connector to Standard Test Leads BNC (M) Connector to (M) F Connector BNC (M) Connector to Alligator Clips Carrying Case Calibration Certificate No