This economical, closed-back student meter offers reliability, ruggedness, and affordability all in one unit. The meter is housed in a durable black plastic case measuring 13.8 cm x 10.0 cm x 9.8 cm. The large 9.5 cm x 8.1 cm clear plastic meter face is designed for easy viewing and has an external zero adjustment. All meter movements are diode protected against overload. Five-way versatile binding posts are simple for students of all levels to use. Accuracy ±2.5% of full scale. Grades 6-12.