Digital salt meter that can measure salt concentration with 0.1% accuracy. - Brand: dretac - Model Name: Digital Salt Meter - Measurement Accuracy: 0.1% - Batteries Used: CR2032 (included) - Display Method: Digital display - Function: 6-level salt concentration display - How to Use: Easy operation Thank you for viewing. This item is brand new and unused, but I noticed a stain on the back of the package. Please be aware of this when considering a purchase.