1. What's the difference between our product and others 1. Our product output is constant current constant voltage, real double closed-loop protection, while protecting voltage and current. 2. Our internal circuit board is developed by ourselves, and other companies on the market are assembled by buying circuit boards. The interior is messy, and we make stickers on the shell, which makes the interior beautiful and looks 3. There are two potentiometers on our product that can adjust the voltage and current, and can set the appropriate voltage and current size. If the voltage and current are too , it is easy to damage the electronic components during the test, resulting in permanent damage 4. Our product output can change the polarity, can test N polarity, can also test P polarity, other home can only test N polarity, can not test P polarity 5. If you know about electronic semiconductor components, you can also directly hit the voltage to the maximum, the current to the minimum, and directly press the red high-voltage start button can also be tested without setting Output voltage: 120-2700VDC (constant voltage and current) Output current: 0.2-3.8mA (constant voltage and current) Measurement object: 1. MOS or transistor or IGBT or diode or regulator or rectifier bridge 2. Capacitor or varistor or unidirectional thyristor. 3.LED LCD TV backlight or LED light board or LED Lithium battery capacity: 3.7V 600mAH Charging interface: TYPE-C Charging current: 500mA Charging indicator: the charging red light is on When full, the red light turns off Charging time: about 70 minutes This product voltage 0-106V with a decimal point, 106V above without a decimal point display: B-blue size: 15 x 10cm Material: ABS colour: white Package Contents: 1 x Tester host 1 x wire clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.