The Replacement AC Adapter for Flinn Scientific Hot Plates and Stirrers restores functionality by replacing the original power adapter included with your unit. It is compatible with all Flinn-brand stirring and heating units. Analog compatibility: AP9801, AP9802, AP9804, AP9805.Digital compatibility: AP9807, AP9806, AP9808, AP9809. Ideal for keeping your lab equipment powered and operational without purchasing a new unit.