This is Waveshare PCIe TO USB 3.2 Gen1 HAT Designed for Raspberry Pi 5, driver-free, plug and play, HAT + Standard. Only compatible with Raspberry Pi 5. Connecting to PI5 via 16PIN Cable, Based on 16PIN PCIe Interface of Raspberry Pi 5 More USB Capability for Raspberry Pi 5, Extends The PCIe Interface To 4x High Speed USB 3.2 Gen1 Ports for connecting more peripherals Onboard Power Monitoring Chip And EEPROM, Real-time monitoring of power status, supports USB port power control via software Reserved Airflow Vent for Cooling fan, Better Cooling Effect For Pi5, more stable operation. Note: Cooling fan is NOT included