Science Education Supplies By HEALLILY

• Substitution: the variable resistance box teaching instrument is suitable and wonderful for school, laboratory use.
• Resistor: decade resistance box, made of plastic material, flexibility and excellent durability, easy to use, for service life.
• Variable: a selection of professional variable resistance box, which has good stability and high accuracy.
• Traffic light: lightweight, easy and convenient to carry and store when not in use without any effort.
• Chakra button stones: it is used to measure resistance. it is used to measure the force and internal resistance of the power supply.