1.Physics and Electrical Laboratory Equipment Calorimeter Teaching Instrument, Specific Heat and Electrical Heat Equivalent 2.Storage and Maintenance,Wash and dry all equipment after use. Store the calorimeter in a dry place to avoid oxidation. Remove the spring before conducting an experiment without a resistor. This prevent damage to the spring when introducing materials other than liquids into the calorimeter. 3.The lid has two holes for placing the thermometer and stirrer. A stirrer is included. 4.The heating coil is easy to replace. Colour:Orange Material:plastic Package Contents: 1 x Calorimeter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.