Thank you for viewing. Purchased at the beginning of December, used less than 10 times. Product details are as follows: A digital salt meter that can measure salt content from 0.0% to 5.0% with an accuracy of ±0.1%. - Brand: TANITA - Model: SO-304 - Measurement Range: 0.0% to 5.0% - Accuracy: ±0.1% - Waterproof Performance: IP67 - Power Supply: AAA batteries (LR03) x 2 - Temperature Range: -5°C to 90°C Thank you for viewing.