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 for measuring unknown resistance. Functions as a tool for measuring electromotive force and internal resistance of power supplies. Acts as a known resistor in circuits to regulate required current. Suitable for physics electricity experiment teaching. Specification: Attenuation Range / Minimum 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: Analog and Digital Accuracy Class: As specified in product details Operating Temperature: As specified in product details DIY Supplies: Electrical Testing Voltage: As specified in product details Package Includes: 1 x Simple Resistance Box Note: Light shooting and different displays may cause slight color variations between the item in the picture and the actual item. Measurement error allowance is +/- 1-3 cm.