Features: The UT681L networking Cable Tester delivers professional grades diagnostic with multi interfaces suitable for RJ11, and cables, enabling precise detection of open circuits, short circuits, and miswiring errors in networking/telephone/coaxial lines. Featuring clear LED statu indicators and ABS+metal construction, this portable tool combines low power efficiency with drop resistant durability for reliability operate in dimly lit server rooms or outdoor environments. Ideal for IT technicians and networking administrators requiring rapid troubleshooting during cable installations or maintenance tasks across residential and commercial settings. networking diagnostic in data centers, office buildings, or home setups quickly verify Ethernet connection, test phone line integrity. This essential networking testing tool eliminates guesswork while ensuring cable performances verification across CAT5/CAT6 systems and analog telephone networks. Specifications: [materials]: ABS, PCB, Metal [Product Size]: 102x62mm, 102x37mm [Product Weight]: 175g [Color]: Red [Wire interfaces type]: RJ11/ coaxial interfaces [Power supply methods]: 9V battery powered [Abnormal Test]: Conducting, short circuit, crossing or breaking. [Applicable scenarios]: networking installation and maintenance Package Includes: 1x RJ11/ professional cable tester wire checker note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.