Portable LED Tester A handy device for testing LEDs, made of and material. Insert the LED into the correctly labeled hole and press the button to test its brightness, glow color, and more. Wide Compatibility row is suitable for 2pin LEDs with a current range of 2mA 30mA, while the bottom row is designed for 4pin LEDs (Piranha LED) with a current range of 20mA 150mA. Convenient and Compact Lightweight and compact design, making it easy to carry and use. Powered by a 9V battery (not included). Accurate Results Get accurate test results for LED brightness and glow color, effective quality control. Use scenarios Manufacturing quality control: quickly verify LED brightness and color during assembly to ensure consistency. Electronics hobbyists: test and compare LEDs before integrating them into projects. Field maintenance and signage: check installed LEDs onsite to diagnose performance and color output.