Gday all decided I wanted to use my sdc with a speaker every now and then was going to buy one but I had a couple of noshi bass burgers the kids left so I thought I would try them they are USB chargeable not sure how long they will last l mounted them so they slip down be side my spo1 went out to my local haunt which has been flogged by everyone and managed to pick up 3 tiddlers was very happy with the sound had spo1volume on 7 and my old boilermaker ears could hear the signals easy will be a great back up or change from headphones cheers Muk.