Upgrade your toolkit with the Phone Line Cable Tester Fiber Optical Tool DTMF Caller ID Auto Detection Search Machine (White). This advanced device is designed to provide precise and efficient testing for phone lines and fiber optic cables, making it an essential tool for both professionals and DIY enthusiasts. Ringer On/Off Adjustment Easily manage your work environment with the ringer on/off adjustment function. This feature allows you to control notifications, ensuring you can focus on your tasks without unnecessary interruptions. Audio/Pulse Conversion Function Adapt to various testing scenarios with the audio/pulse conversion function. Effortlessly switch between modes to suit different phone line systems, guaranteeing accurate and reliable results every time. Redial and Hang Up Function Increase your efficiency with the convenient redial and hang up functions. These features simplify the process of managing multiple tests and calls, saving you valuable time during busy workdays. Advanced Micro-Processing Chip Engineered with the latest micro-processing chip and premium electronic circuitry, this tester delivers outstanding reliability and performance. The advanced technology ensures precise detection and long-term durability, making it a dependable choice for any job. Modern and Elegant Design The tester features a novel and attractive white appearance, combining modern aesthetics with practical design. Its sleek and generous look makes it a standout addition to any professional toolkit. Choose the Phone Line Cable Tester Fiber Optical Tool DTMF Caller ID Auto Detection Search Machine (White) for a perfect blend of innovative features, robust construction, and user-friendly operation. Experience enhanced productivity and confidence in every test.