Features: Can be used to verify part of the circuit using Ohm's law. Functions as an additional resistor to extend the voltage range. Used for measuring unknown resistance. Capable of measuring electromotive force and internal resistance of power supplies. Serves 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 / 5.51 x 3.94 x 1.97 inch 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 the color of the item in the picture to differ slightly from the actual item. Measurement allowance error is +/- 1-3 cm.