The present invention relates to an agitator unit for use with a blood product storage system, wherein the agitator unit has a movable compartment to receive blood products and a drive 4 for movement of the compartment. The invention is distinguished in that the drive 4 of the agitator unit has at least one motor 16 and a gear system 17 with at least one planetary gear unit 18, wherein the planetary gear unit 18 has at least one planet wheel 21, which is eccentrically movable by means of the motor 16, and a planet disc 19, wherein the planet wheel 21 is connected to the compartment 2 by means of a spigot 22 and rolls on an internal periphery 20 of the planet disc 19, wherein the spigot 22 is adjustable in its relative position. In addition, the invention relates to a modular blood product storage system with an agitator unit according to the invention.
