The Benchmark Scientific B2402E BeadBath Duo 2L with Lift-Off Lid, 230V is a laboratory bath designed for precision temperature control when used with water, or with the increasingly popular Lab Armor thermal beads. The B2402-E features a "MODE" button that can be used to toggle between "Bead" or "Water" mode. Choosing the correct mode will regulate the internal heating system, automatically adjusting the operation and balance of the multiple internal heating elements to ensure optimal performance. The result is one combination bath that is suitable for accurate and uniform temperature control in either condition. While the majority of research laboratories today are using water baths, many prefer the convenience of bead baths. The B2402-E BeadBath Duo provides the best of both worlds, allowing conversion from one bath type to the other, with the simple press of a button.