The Boston BFS-30 is a compact and sturdy sustain pedal with an aluminum housing. It features a polarity switch, making it compatible with almost all keyboards.
You can connect several pedals together thanks to the handy coupling system, so that your pedals do not all slide together during use.
The sustain pedal is the most commonly used pedal on a piano and simply put, with the pedal depressed, all notes linger until they die out.