Digital display high-precision salt meter, measuring range 0.0% - 5.0%, ideal for confirming salt-free meals with an accuracy of ±0.1%. - Brand: TANITA - Model: SO-304 - Function: Digital salt meter - Measuring range: 0.0% - 5.0% - Accuracy: ±0.1% - Operating temperature range: 5°C - 90°C - Accessories: 2 AA batteries, instruction manual Thank you for viewing. I received this, but I kept it without opening it. I opened it and tested it for the first time for this listing, and it is in perfect working order.