Feature: 1. UNIQUE TRANSMISSION TECHNOLOGY: This product is a multi purpose line positioning product designed on the basis of long term practical experience, breaking through conventional concepts and using unique data transmission technology 2. LONG DISTANCE APPLICABLE: With functions such as line hunting, line pairing, line on off, and lighting, has the characteristics of long transmission distance and clear voice. A practical tool for various communication lines installation and engineering maintenance personnel 3. WIDE APPLICATION: Quickly and efficiently find the desired cable from a large number of harness cables. Widely used in telephone systems, computer networks, video networks, optical fiber communication projects and other engineering occasion of metal wire lines 4. ACCURATE AND NOISE FREE: The product is a noise free digital line finding instrument, which adopts the latest digital line hunting technology to achieve accurate digital and noise free line finding 5. ESSENTIAL FOR FINDING CABLES: The line meter consists of a signal transmitter, a line finder and corresponding adapter lines, which is an essential tool for finding cables in various metal line construction projects such as computer network cables, telecommunication network communication cables, video network cables, and routine maintenance Specification: Item Type: Network Cable Tester Model: ET613 Material: ABS Receiver Battery: 1 x 6F22 9V battery(not included) Transmitter Battery: 3 x AA 1.5V battery(not included) Uses: Network cable hunting and testing Working Temperature: 0℃~40℃ Storage: -10℃~50℃ Relative Humidity: