Function: UNIQUE TRANSMISSION TECHNOLOGY: This product is a multifunctional do line positioning product designed based on many years of practical experience, breaking conventional concepts and using unique data transmission technology Long distance APPLIED: With features such as line hunting, line pairing, line shutdown and lighting, it is characterized by long transmission distance and clear voice. Practical tool do installation of various communication lines and maintenance personnel Extensive use: Quickly and efficiently find the cable you want from a large number of bundle cables. ACCURATE AND NOISE DATA: The product is a noise-free digital do line search device that adopts the latest digital line hunting technology to achieve accurate digital and noise-free line finding Item type: Tester network cables Model: ET613 Material: ABS Receiver battery: 1 x 6F22 9V battery (not included) Transmitter battery: 3 x AA 1.5V battery (not included) Applications: Searching and testing network cables Working Temperature: 040 Relative humidity: <90% Main Function Analog Cable Trace Cable Trace Digitization Trace Cable Supporting PoE Identifying the Quality of Wire Pairs and Wire Connections Battery Voltage Polarity Check PoE Voltage Measurement PoE Voltage Polarity Measurement Break Point Check Vibration Indication Continuity Test Trace Signal Transmission Distance 3Km Output Signal Level 15Vp-p Flashlight Adjustable Volume Low Battery Indicator (Transmitter) Auto Power Off (Transmitter) Powers off after about 20 minutes of inactivity Auto Power Off (Receiver) List of packages: 1 x Transmitter 1 x Receiver 1 x Crocodile Adapter Line 1 x RJ-45 Adapter Cable 1 x RJ-11 Adapter Cable 1 x User's Manual 1 x Tool Bag 1. Do not look directly for cables connected do strong electricity (such as wires in the house), otherwise it will cause injury to people and damage to equipment. 2. Pay attention to lightning protection when using the instrument during a storm to avoid human injuries and equipment damage caused by lightning caused by the line. 3. The LCD screen of the host or the POWER light of the line finder flashes, indicating that the battery voltage is low, the battery should be replaced. 4. When the product is not used for a long time, remove the battery to avoid water leakage from the battery and corrosion of the battery holder, resulting in poor kontakt.