Features:This tone generator kit is made of plastic materials, durable, wear resistant and corrosion resistantInsulated probes and built-in speakers are effective in avoiding short-circuiting of conductors and make it safer to use.This 200EP Inductive amplifier is widely used for cable and wire maintenance. The measurement area includes line tracking, short circuit test, and clear/busy/ringing identification.For non-terminal cables, the clamp mode can be used for direct measurements as well as telephone and network line measurements.You can choose continuous or adjustable generator, the method is simple, and the test result is accurate.Specifications:Material: plasticColor: blackSize(L x W x H):about 231x55x28mmGain: nominal 30dBInput impedance: nominal 100M OhmProbe tip resistance(min):Metal tip: 0 OhmPlastic tip: 300 OhmBattery: 1 x 9V battery(not included)Temperature: celsius: 0 - 50Fahrenheit: 32- 122Package included:1pc x cable tester1pc x receiver1pc x launcher1pc x cloth bag1pc x English manual1pc x spare headNote:1. Due to the light and screen difference, the item& 039;s color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement.