Features: The GM328A Transistor Tester is a versatile tool for measuring transistors, diodes, capacitors, and generating square waves signals, featuring a high contrast LCD for precise readings. Compact and durability, this tester operates on 8V-12V power with low energy consumption, ideal for on site repairs and lab experiments. Designed for electronics engineers, hobbyists, and educators, it simplifies component testing and circuit analysis with intuitively controls. Perfect for labs, workshops, or classrooms, its portable design ensures reliability performances in testing transistors, diodes, and signals generation. Enhances your projects with accurate voltages/frequency measurements and testing, backed by ruggeds PCB construction for long lasting use. Specifications: Component: PCB Size:Approx.7.8x6.3cm/3.07x2.48inch Input voltages: 8V-12V 20mA Battery powered by pad contact: 9V Chip:ATMEGA328PU; Applicable scenario:Electronics Laboratory,ucation and training; Package Includes: 1pc GM328A Transistor Tester note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.