Material and durability - Bakelite construction provides a durable, long lasting housing for reliable use in the lab or on the bench Resistance range and control - 0 to 9 ohms total range - Five switchable ranges enable precise and adjustable resistance within the low-ohm range Function and purpose - Precise variable decade resistance box designed for calibration, measurement, and circuit development in electronics work Operating environment - Designed to operate from 5 to 35 degrees Celsius - Humidity range 25 to 80 percent relative humidity - Maintains reliable performance across typical lab and workshop environments Practical applications - Calibrating low-ohm components and measurement instruments - Testing and prototyping low-resistance circuits and loads - Educational demonstrations of Ohm's law and resistor networks Compatibility and suitability - Suitable for use in electronics laboratories and with standard testing setups and instruments Why this model stands out - Durable bakelite build combined with a precise, low-resistance range and multiple switchable ranges for flexible, accurate adjustments in professional and educational settings