USBKILLER3 adds a switch (equivalent to the insurance function) to prevent irreversible damage caused by misoperation, and the metal casing has a better texture. NOTE:This product is used for USB interface pressure test, can not be used against the and behavior!! testing and research, any disputes and adverse consequences shop is not responsible for, consider carefully buying!!! Insert into the USB interface, It will automatically discharge. You only need to record the data you need to measure with other measuring instruments while it is discharging. It is recommended that the connection work time is less than 10 seconds. In the limit case, it does not . It is only suitable for computer motherboards, industrial control equipment, testing of measuring instruments and other discrete power supply mainframes or their . interface is USB TYPE-A.Safety Precautions: This product will generate high voltage during operation (the output of the boost circuit is fixed at 300V, when the output is connected to the load, the voltage is pulled down to the discharge voltage, the center value is 230V, and the error is +/- 30%). Therefore, do not remove or damage the heat-shrinkable tube skin attached to this product (the heat-shrinkable tube has a withstand voltage of 600V). If the heat-shrinkable tube skin is damaged, stop using it. If any abnormal conditions such as abnormal output voltage (too high or too low), abnormal sound, excessive heat or even fire occur during operation, immediately turn off the power. Color: Random Color(Random color, 't accept the specified color.) Material: metal Package Contents: 1 x USB 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.