Features: Experience comprehensive telecommunication line troubleshooting with our Cable Tester, a must for efficient line maintenance and engineering tests. Our Cable Tester boasts integrated design that combines line trackings, repair functions, and engineering test capabilities, ensuring precise diagnostics . For telecom maintenance professionals and IT support staff, this tool is essential for anyone tasked with maintaining and repairing communication lines. For telecom corporate office networking maintenance, this device ensures uninterrupted communication and smooth operational flow. Crafted from plastic, this Cable Tester is a valuable addition to your technology toolkit, simplifying complex line problems with its user friendly interfaces. Specifications: Legnth：about 14cm/5.51in Component:ABS Features： 1. 50 groups of incomes calls, 16 groups of outgoing calls 2. 16kinds of music ringing option 3. Caller identinination and call time record 4. Double standard caller display 5. Collection time can be selected 6. Incomes and outgoing call number search, call back, deletes function 7. Real-time date and day of the week display, display brightness adjustable in 5level Package Includes: 1PC Communication Line Checking Phone note: Due to problem of lighting,there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurement