Metravi CAL 400 4 is a calibrator with current ranging from 0-19.999mA, and accuracy of ±0.05%, and a voltage of 0-199.99mV. It is an ideal instrument to adjust instrument frequency. Made with the highest grade materials and carefully constructed under keen vigilance, this product gives precise results, and the readings do not fluctuate. It comes with a small pouch to store it. 2 batteries are enclosed in the package, along with connectors. It allows the output to be adjusted by 10 turn POT for "COARSE" and "FINE." It is lightweight and durable and weighs about 450 Grams, and is built to last for a long time. It comes with a one-year guarantee covering all or any manufacturing defects. Product Specifications: Accuracy: ± 0.05 percent Brand: Metravi Country of Origin: India Direct current: 0-19.999 mA Model: CAL 400 4 Product weight: 450grams