Functions: line function, hunt, line test, earplugs function, sensitivity adjustable Remarks: 1. The characteristics of the line features: quick test line open circuit, short circuit and line sequence. Hunt: Among the many line quickly identify needed a pair of lines 3 line status test: a line DC level detection and the positive and negative polarity determination b. ringing signal detection c open circuit or short-circuit test sensitivity adjustment function: When used according to need to adjust the volume size 5. headset features: in a noisy occasions, wearing headphones Product Description line function: quick test line open circuit, short circuit and line sequence and other characteristics can be tested twisted-pair cable , telephone lines, BNC coaxial cable, USB cable and alligator clip measuring ordinary wire. hunt: Among the many lines in quickly find a pair of lines need to hunt up to 1200 meters in length more than 3 line status test: a line DC level detection and the positive and negative polarity determination b ringing signal detection c open circuit or short-circuit test. sensitivity adjustment function: when used according to the need to adjust the volume 5. headset features : in a noisy occasions, wearing headphones. Operating Current: Emission current ≤ 20mA receive current ≤ 50 mA Power Specifications: DC 9V superposition battery Signal distance: transmission distance over 3000m safety performance: Use safety (the probe can be directly exposed metal wires.) check line FAQ answer: switch live to find? can hunt is the number of meters in length, the length of the survey line is how many meters hunt length of 3 km, the length of the survey line is 1.2 km to find strong electricity? can not, we are about out new products designed to find strong power, you can focus on the middle of my line is a short circuit can find you? can be the case of short circuit can not hunt? wire only two-wire, short circuit, it can not be searched, but more than two-core wire, as long as not all cores short circuit, you can find! find wall inside the line? SML-QD68 wall 20cm line can be measured to see to say 8828 and 8868 can be measured crosstalk, crosstalk, what does that mean? crosstalk network cable is not connected by the international connection, Pu can cable tester measured pass, but the use of which will be very slow speed, in which case crosstalk, we SML-8828 SML-8868, SML-WD68, SML-QD68 these products are intuitive measure! which a product can be measured breakpoint? length measurement function to measure the breakpoint. SML-8838, SML-8868.SML-WD68.SML-QD68. can be measured breakpoint the check line What is the difference between 8868 and 8828? measured length in 8868, 8828 can not, the other are the same!