IKA MIXSTER Add-on unit, Magnetic stirrer, without power supplyIKA MIXSTER Add on unit, Magnetic stirrer, without power supply Add on unit for existing IKA TWISTER setups. It is supplied without power supply and without accessories. Please check whether the power of your currently used power supply is sufficient to supply the planned number of IKA TWISTER devices: Up to 2 devices: power supply from IKA TWISTER SET 1 & 2 2 to 4 devices: TW. PWR. 1 or power supply from IKA TWISTER SET 3 & 4 4 to 30 devices: TW.