M5Stack A089 BUS Socket DIP 13.2 is an M-BUS bus expansion header set that includes 10 2x15P headers. This header features similar spacing and the number of holes of the female row compared to the M5Core. This allows the header to be used in DIY design circuit and to connect it to the M5 main control. The BUS Socket DIP 13.2 offers 2.54mm pitch, 6.6mm needle length, and has dimensions of 39mm x 5mm x 16mm.