Feature:1. Reliable 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.2. Multifunctional: Logic test pen is suitable for high and low level testing, digital circuit debugging and measurement and other occasions, to meet your various needs.3. Accurate Measurement: A wide range of voltages such as 5V and 3.3V can be accurately tested, allowing you to quickly diagnose circuit problems.4. Easy 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.5. Widely Used: Logic circuit tester is suitable for many occasions such as factories, laboratories, schools and families, and has been widely praised and trusted.Specification:Item Type: Logic test penMaterial: ABSFunction: Level testSupply Voltage: 5V or 3.3VLevel 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 Pen1 x Cord