This is the perfect cable choice for those that want to output music or general sound for the micro:bit, to either headphones.
Connect the crocodile clips to your micro:bit and plug your headphones into the 3.5mm socket, then code some music.
At one end of the cable are the black and red crocodile clips, which connect to the micro:bits GND and Pin 0 respectively. At the other end of the cable is a 3.5mm TRS (tip, ring sleeve) stereo jack. The 3.5mm TRS stereo jack means you can connect your headphones directly to your micro:bit."