Hear the good news! This wee speaker is a great addition to any audio project where you need 8 ohm impedance and 1W or less of power. We particularly like this speaker as it is small and comes with nice skinny wires with a connector on the end. It has a handy "Molex PicoBlade" 1.25mm pitch 2-pin cable, which makes plugging into a board easy. Or you can cut off the connector and just solder/clamp onto the wires directly.
This speaker will work perfectly with our HalloWing M0 Express - it even snaps into the speaker connector onboard. But you can also use it with any of our mono audio amps, such as the PAM8302 or MAX98357A mono class D amplifiers.