Features: Can be part of the circuit Ohm's law. Used as an additional resistor to expand the range of volts. Used to measure unknown resistance. Used as electromotive force and internal resistance for measuring power supply. Used as a known resistor in the circuit to regulate the required current. Used for physical electricity experiment teaching. Specification: Attenuation Range / Mini Step: 0 to 9999ohm, 1 ohm step Shell material: Plastic Dimensions: 14x10x5cm / 5.51x3.94x1.97inch Color: Black Quantity: 1 Pc Display Type: Analogue and Digital Accuracy Class: as details Operating Temperature: as details Testing Voltage: as details Electrical Material: Plastic Package includes: 1 * Simple Resistance Box Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3cm. 100% new and high quality