Welcome to the store! NOTE: This product is for USB interface pressure testing only and should not be used for illegal or unethical behavior!! 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 desired USB interface and will automatically discharge. You only need to record the data you need to measure with other measuring instruments while it discharges. However, it is recommended that the connection time be less than 10 seconds. In extreme cases, do not exceed 30 seconds. Since the product has many components placed in a very small area, the effect is obvious. Under the premise that you cannot wait for good heat dissipation (forced cooling), please 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 mainframes or their alternatives. Its interface is USB TYPE-A. Not applicable: microusb .Usb typec. Lighting .A pin-intensive interface. Operational precautions: Avoid using and storing this product in areas that exceed the temperature limit, excessive humidity, and excessive dust. Do not subject the product to strong impacts, crushing, or bending. Do not attempt to disassemble this product. Safety precautions: 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 booster circuit is fixed at 300V; when the output is connected to the load, the voltage is pulled down to the discharge threshold voltage; the central 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 noise, excessive heat, or even fire occur during operation, turn it off immediately. 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 with electricity, but it requires the USB interface's output capacity: the output voltage is 5V, the error is no more than +/- 20%, and the current output 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 a little different from the real thing. The allowable measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!