The CompoGuard uses innovative mixer technology in order to combine safety with efficiency in whole blood donation. It provides unique volume monitoring by the patients and prevents venting of the primary bag following donation. It prevents back strain injury to operators. The CompoGuard has an improved mixing of inline systems and offers the highest efficiency of mobile data management. Four different models are available: the CompoGuard Data, the CompoGuard Seal, the CompoGuard Basic and the CompoGuard Complete. The DonationMaster Net is a PC program which is designed for radio communication with CompoGuard and offers the highest efficiency of mobile data management. The Radio Frequency (RF) automatically collects all of the donation data and is used to update all of the CompoGuard settings.