Welcome to our store! This versatile device offers automatic detection of zener diodes from 0.01-20V. It features self-testing with automatic calibration and supports infrared encoding. The infrared waveform is clearly displayed on the TFT graphic screen. Features: Automatic detection of zener diodes 0.01-20V Self-test with automatic calibration Supports infrared encoding Infrared waveform display Infrared receiving instructions TFT graphic display of measurement results One-key operation Automatic shutdown (timeout setting) Built-in high-capacity rechargeable lithium-ion battery Lithium-ion battery voltage detection Specification: Color: As shown in the pictures Capacitor: 25pF-100mF Resistor: 0.01-50MΩ Inductor: 0.01mH-20H Battery: 0.1-4.5V Weight: Approx. 121g/4.3oz Package List: 1 x Transistor Tester 1 x USB Cable 1 x Red and Yellow-Green Contact Line 2 x Capacitors Your 100% satisfaction is our top priority. We are committed to providing you with the best service. If you encounter any issues upon receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!