Features: Experience efficient and convenient testing with our driver board controller, for quick online detection without disassembly, saving time and labor costs. This various tool features replaceable probes to accommodate various optocoupler type and specifications, enhancing flexibility and precise in electronic component testing. Ideal for electronic repair engineers, hobbyists, production line technicians, and educational institutions seek reliable optocoupler performances assessment. Perfect for use in electronic repair centers, home electronics testing, production lines, and laboratory research, ensuring safety and quality of your devices. Crafted from ABS materials, this ergonomic handheld device offer a comfortable grip and intuitive operation, complete with LED indicators or LCD screen for realtime feedback. Specifications: Component:ABS Size:Approx.6x1.2cm/2.36x0.47inch Package Includes: 1pcs Handheld Controller Board note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.