Main functions: 1. Check and find the needed cables among so many cables in one time. 2. Continuity test wiremap for Lan cables. 3. Diagnose the breakage, open, short, cro. 4. Visible indication: pin-to-pin cable map for individual cable (not by pairs). 5. Transmitter with RJ11 connector and pair of alligator clips. 6. Low Voltage alarm function. 7. Earphone permits use in noisy environments. 8. LED light aists use in dark corners. Technical parameters NF-806 Transmitter specifications Tone frequency 200Hz Max. distance of transmiion Up to 2 kilometers Max. working current Le than 10mA Volume Regulate Function Audio volume level control Tone mode 2 Tones, adjustable Compatible connectors RJ45, cable clip with RJ11 connector Max. signal voltage 8Vp-p LED lights display Wiremap, tone, tracing Voltage protection AC 60V/DC 42V Battery Type DC9.0VNEDA 1604/6F22) x 1pc Dimensions (LxWxD) 15 x 3.7 x 2cm NF-806 Receiver specifications Frequency 200kHz The Max. working current Le than 30mA Earphone jack 1 Battery Type DC9.0VNEDA 1604/6F22) x1pc Dimensions (LxWxD) 12.2 x 4.5 x 2.3cm Attention: 1.Don't connected high voltage lines to avoid buring out the machine. 2.Put into the right place to avoid hurting others,because of the sharp part. 3.Connected the cable to the right port. 4.Read the user manual before use it. Package Include: 1X NF-806 wire tracker