Shop name: Chong Qing Shuo Yue Ke Ji You Xian Gong Si Features: Can be used as part of a circuit to apply Ohm's law. Serves as an additional resistor to extend voltage range. Used for measuring unknown resistance. Functions as an electromotive force and internal resistance measuring tool for power supply testing. Acts as a known resistor in circuits to regulate required current. Suitable for physics electricity experiment teaching. Specifications: Attenuation Range / Minimum Step: 0 to 9999 ohms, 1 ohm step Shell Material: Plastic Dimensions: 14 x 10 x 5 cm / 5.51 x 3.94 x 1.97 inches Color: Black Quantity: 1 Piece Display Type: Analog and Digital Accuracy Class: As specified Operating Temperature: As specified Testing Voltage: As specified Material: Plastic Package Includes: 1 x Simple Resistance Box Note: The package includes only the items listed above; other products are not included. Due to lighting and display differences, the color in the image may slightly vary from the actual product. Measurement error allowance: +/- 1-3 cm.