Features: Can be used to verify part of the circuit using Ohm's law. Serves as an additional resistor to extend the voltage range. Used to measure unknown resistance. Can measure electromotive force and internal resistance of a power supply. Acts as a known resistor in a circuit to regulate required current. Suitable for physics electricity experiment teaching. Specification: Attenuation Range / Mini Step: 0 to 9999 ohm, 1 ohm step Shell Material: Plastic Dimensions: 14 x 10 x 5 cm Color: Black Quantity: 1 Piece Display Type: Analogue and Digital Accuracy Class: As specified Operating Temperature: As specified DIY Supplies: Electrical Testing Voltage: As specified Package Includes: 1 x Simple Resistance Box Note: Light shooting and different displays may cause slight color variation between the item in the picture and the actual product. Measurement error allowance is +/- 1-3 cm.