功能:The Raspberry Pi PoE HAT is an add-on board for the Raspberry Pi 4 Model B and the Raspberry Pi 3 Model B+. It allows the Raspberry Pi to be powered via a power-enabled Ethernet network
功能:The Raspberry Pi TV HAT has a DVB-T2 and DVB-T tuner on board, which allows you to receive and decode digital television streams on your Raspberry Pi.