Feature: 1. All-In-One Testing Solution: The ET638 combines a network cable tester with a multimeter, offering a comprehensive set of features including AC/DC voltage, diode, resistance, capacitance, AC/DC current, cable mapping, network length measurement, PoE testing, crimping test, and NCV (Non-Contact Voltage) test. 2. High-Precision Optical Power Meter: Equipped with a high-precision optical power meter, the device can measure optical power levels from 6dBm to -70dBm. The advanced optical power meter ensures accurate and reliable measurements, helping you to maintain and troubleshoot fiber optic networks effectively. 3. Visual Fault Locator: The red laser visual fault locator can detect faults in fiber optic cables up to a distance of 10 kilometers, allowing you to quickly identify and locate issues such as breaks or bends. Save time and effort by pinpointing faults in your fiber optic cables with precision. The visual fault locator is an indispensable tool for maintaining and repairing fiber optic networks, ensuring minimal downtime. 4. Advanced Cable Analysis: The device provides powerful cable analysis features, including detection of open circuits, short circuits, cross connections, and crystal head crimping test. Ensure the integrity and performance of your network cabling with the advanced analysis features. This comprehensive testing helps you to identify and resolve issues before they become critical, enhancing the reliability of your network. 5. User-Friendly Design: The ET636 features a 3.2-inch HD screen and supports four languages (Chinese, English, German, and Spanish). The intuitive interface and multilingual support make this device accessible to users around the world. The high-definition screen ensures clear and readable results, even in challenging environments. Specification: Brand: TOOLTOP Item: Multifunctional Network Cable Tester Color: Black, Blue Product Material: ABS Length Measurement: Ethernet Cable (600M)/Telephone Cable (400M)/Coaxial Cable (400M) Wire Connection: Normal/Short Circuit/Broken/Crossed Optical Power: mW/uW/nW/-70.00~6.00dBm Red Light Function: 10mW (Approximately 10kM) Long on/Flashing (1Hz/2Hz)/off Switch Flash: 10M/100M/1000M POE Device Testing: Standard/non-standard POE, Voltage Value/Polarity ID Pairing Function: Optional 1-15 Engineering Accounting: Store Records of 100/unit Price/Amount DC Voltage: 600.00mV~1000V (± 0.5%+0.3) AC Voltage: 600.00mV~750V (± 0.8%+0.5) DC Current: 600.00mA~10A (± 1%+0.4) AC Current: 600.00mA~10A (± 1%+0.5) Resistance: 600.00Q-60MQ (± 1%+0.6) Capacitor: 6.0000nF~60MF (± 2%+0.6) Frequency: 6.0000Hz~6MHz (± 1%+0.1) On/off Buzzing: