RJ45 Ethernet and Audio Cable Tester - Alctron DB-4C   Tester for various cables included   CAT5 RJ45 Ethernet XLR (3 & 5 Pin) Male & Female 6.35mm stereo 6.35mm mono 3.5mmmini  RCA Speakon 2, 4 & 8 Conductors Banana connector  General characteristics Easy to use 8-way rotary control Individual LEDs confirm continuity of each conductor and correct phase connections  Sturdy and compact all-metal chassis Probes and battery are included Box contents DB-4C Tester Probes 9V Battery