This product is designed for testing USB interfaces on computer motherboards, industrial control equipment, and measurement instruments. It features a USB Type-A interface and is not compatible with Micro-USB, USB-C, or Lightning connectors. Operational precautions: - Avoid use or storage in environments exceeding specified temperature limits, high humidity, or excessive dust. - Do not subject the device to impact, crushing, or bending. - Do not disassemble the device. - No charging required. - Limit connection time to no more than 10 seconds during operation (maximum 30 seconds in exceptional cases) to prevent overheating. - Do not connect to AC power adapters, chargers, or portable power banks. This is a USB High Voltage Pulse Generator intended solely for authorized testing and research purposes. It is not a USB flash drive. The third-generation model delivers an output voltage of –300 V to –500 V. When connected to a compatible USB port, it automatically discharges. Users should record measurement data using external instruments during discharge. Due to its compact design and high component density, adequate heat dissipation is critical; forced cooling is recommended if extended operation is necessary. Color: Black-Gray Material: Metal Package Contents: 1 × USB Killer Note: Other accessories shown are not included. Display and lighting conditions may cause slight color variation.