Low Voltage Cable/Network Tester Testing Functions Cable Length Display Cable Speed Qualification Continuity Testing Ethernet Service Detection Opens/Shorts Detection PoE/PoE+ Detection Audio Transmission Display Size 4 in For Use With CCTV Cables Coax Cable IP Cable PoE Cable Input Type BNC F-Type RJ45 Display Screen Type LCD with Backlight Backlit Digital Display Yes Battery Chemistry Alkaline Battery Size AA Color Gray/Red Communication Protocol USB