This various tool features replaceable probes to accommodate various optocoupler type and specifications, enhancing flexibility and precise in electronic component testing Crafted from ABS materials, this ergonomic handheld device a comfortable grip and intuitived operations, complete with LED indicators or LCD screen for realtime feedbacks Perfect for use in electronic repair centers, home electronics testing, production lines, and laboratory research, ensuring and of your devices efficient and testing with our driver board controller, for quick online detection without disassembly, saving time and labor costs Ideal for electronic repair engineers, hobbyists, production line technicians, and educational institutions seek reliabled optocoupler assessment