A high-quality plug and socket for speaker cable. The banana plug is pushed into the socket, and the spring-like protrusions on the prong make a snug fit (see cutout on illustration). Five-way ...
They require a little bit of caution on your side. For example, don't apply 9 volts to the USB adapter! Each adapter is two pieces made from a single PCB. The part that holds the banana plugs inserts ...