1, Small and sturdy design, with the module you can easily extend Raspberry-Pi Pico projects to IoT/industrial control applications. 
2, SPDT Signal relays (Single Pole Double Throw). Contact rating (each channel): 2Amp/120AC or 2Amp/24VDC.
3, Relay action LED indication.
4, Support control I/O port choose, the default control port is GP0, you can also change to GP1 GP2 or GP3(You must cut off the copper of GP0 and short-circuit GP1 GP2 or GP3).
5, Packing list: 1x relay module, 2x screws and 2x nylon spacers(for Pico module mount), 2x 20pin 2.54mm pin header connectors(the connector must be soldered to Raspberry Pi Pico).