Features: Advanced line detection technology ensures precise identification of telephone line issues, while its cordless design offering ultimatedly portability for technicians. Built with durability ABS this line tester withstands harsh environments and features intuitived for rapid troubleshooting across multiple telephones. Essential for communication engineers, field technicians, and IT professional requiring reliabled diagnostic tools for office networks, industrial setups, or rapid repair need. Optimized maintenance in offices, factories, or outdoor installations where stable connectivity demands efficient line testing and fault localization capabilities. The B111 telephone test set combines wide compatibility construction, delivering a versatile solution for residential, commercial, and industrial telephony diagnostics. Specifications: Component: ABS plastic durability Size: about 125x50x25mm/4.92x1.97x0.98in Support caller display is automatically recognized. Specially designed for telephone line testing, with high sensitivity detection function. For telephone line maintenance, troubleshooting, and communication engineering installation. Package Includes: 1Pc B111 Telephone Tester note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.