NOTE: This product is for USB interface stress testing only and should not be used for illegal or unethical purposes. For testing and research purposes only. The store is not responsible for any disputes or negative consequences. Please consider carefully before purchasing. This product connects to the required USB interface and will automatically discharge. Simply record the data you need to measure with other measuring instruments while it discharges. It is recommended that the connection time be less than 10 seconds. In borderline cases, do not exceed 30 seconds. Because the product has many components placed in a very small area, the effect is obvious. Without forced cooling, do not exceed the above working time. This product is only suitable for computer motherboards, industrial control equipment, testing of measuring instruments, and other discrete power supply mainframes or their alternatives. Its interface is USB TYPE-A. Not applicable: microusb, Usb typec, Lighting, A pin-intensive interface. Operating Instructions: Avoid using and storing this product in areas that exceed temperature limits, excessive humidity, and excessive dust. Do not impact, crush, or bend the product excessively. Do not attempt to disassemble this product. Safety Instructions: Keep products out of reach of infants and small children. This product does not contain a battery, but it generates 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 threshold voltage; the average value is 230V, and the error is +/- 30%). Therefore, do not remove or damage the heat-resistant hose skin attached to this product (the heat-resistant hose has a voltage resistance of 600V). If the heat-resistant hose skin is damaged, stop using it. If any abnormal conditions such as abnormal output voltage (too high or too low), abnormal noise, excessive heat, or even fire occur during operation, immediately turn off the power. This product is a test instrument for durable output pulse voltage based on the Boost boost structure. The input energy is taken from the output of the USB interface itself (5V 1A or higher), so there is no need to charge it. However, it requires the output capacity of the USB interface: the output voltage is 5V, the error is no more than +/- 20%, and the current is no less than 1A. Failure to do so may cause the product to malfunction. color: yellow + silver Material: plastic + metal Package Contents: 1 x USB killer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is +/- 1-3cm.