• Combines wire‑map testing, cable‑length measurement (2.5–200 m), tone generator, PoE detection and switch port blink for CAT5/6 cables.
• Wire‑map identifies open/short/cross faults; length measurement uses TDR; scanning frequency 455 kHz with analog and digital tone modes.
• PoE tester detects voltage (5–60 V) and IEEE 802.3af/at standards; port blink supports 10/100/1000 M for locating switch ports.
• Receiver has adjustable sensitivity, non‑contact AC voltage detection (70–1000 V), LED flashlight and headphone jack; transmitter uses a 3.7 V 1400 mAh battery.