BTX TA-RATPACK XLR cable test system consists of two pocket sized pieces (Sender and Sniffer) that attach to each end of your XLR cable. With no phantom power, Sender acts as a power supply for the Sniffer (with phantom power present, Sniffer can work alone). The Sniffer contains three 2-color LEDs which indicate the status of the cable.
This simple and reliable tester makes it easy to test even long cables in the field.