Plastic body: The instrument shell is made of excellent Plastic material, which has good toughness and can be used in different environments. Product components: This instrument is mainly made of a solution box, an electrode, a switch, lamp sockets, bulbs, wires and other components, which are practical and practical. For chemistry lesson: This instrument can be used to efficiently detect the conductivity properties of solutions commonly used in chemistry lessons of middle school. 6pcs wire clamps: This set is equipped with 6pcs wire clamps with a simple design that makes it easy to install and detect LED indicator: LED lights up when it comes to a strong solution. In the case of a weak solution, the LED lights up one to two. LED will not light up when it comes to an -free solution. Technical data: Product type: Microsolution conductivity tester. Material: Plastic Color: As shown Package Contents: 1 x Solvent Conductivity Tester Caution: 1. After use, rinse the electrodes with distilled water, air dry and stored in . 2. The tool should be stored in a cool and dry place. 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.