Item Type: Logic test pen Material: ABS Function: Level test Supply Voltage: 5V or 3.3V Level Determination: 5V power supply (0V< low level <0.6V, 0.6 < high resistance <2.4V, 2.4V< high level) Level Determination: 5V power supply (OV< low level <0.39V, 0.39< high resistance <1.49V, 1.49V< high level) Package List 1 x Logic Test Pen 1 x Cord 1Reliable Quality: Our logic test pen is made of premium ABS materials, easy to carry and use, is a good helper of electronic production, long service life. 2Multifunctional: Logic test pen is suitable for high and low level testing, digital circuit debugging and measurement and other occasions, to meet your various needs. 3Accurate Measurement: A wide range of voltages such as 5V and 3.3V can be accurately tested, allowing you to quickly diagnose circuit problems. 4Easy to Operate: This 5V 3.3V high low level tester is easy and safe to use, can quickly judge the accuracy of the circuit, effectively improve work efficiency. 5Widely Used: Logic circuit tester is suitable for many occasions such as factories, laboratories, schools and families, and has been widely praised and trusted.