In case you want to control more than one BioShake, you can use for example an MOXA USB to Serial hub.
This Hub is tested and approved for BioShake.
You can order that hub directly from us (2016-0071 Moxa 4-port for connection of 1-4 units, 2016-0072 Moxa 8-port for connection of 1-8 units, 2016-0073 Moxa 16-port for connection of 1-16 units) or you buy it on your local computer shop.