Magnetic stirrer is a basic model magnetic stirrer, mainly used for stirring low viscosity liquid or solid-liquid mixture. The magnetic stirrer is widely used in the fields of chemical synthesis, biopharmaceuticals, scientific research institutes, etc. The magnetic stirrer can be used for stirring the sample by changing the polarity of the two ends of the base to push the magnetic stirrer to rotate and make the sample evenly mixed. There are two types ,analogue model and digital model . Digital one can set seed and time ,The standard set include the stirrer and stirring bar, power plug and mabual.