It is a kind of simple and portable water test pen, by testing the water all dissolved solid values or conductivity of the water to judge the purity or pollution level of the water. It can be widely used in water treatment industry, drinking water industry, home, travel, field work and so on. Usually, the lower the total dissolved solids value is, the less soluble the water salts and heavy metal ions in the water, and the purer the water is. You can give it a try. Features: Carefully check the purity of the water in your home. By testing the total dissolved solids in water or the conductivity of water to assess the purity or level of contamination of the water. It also has a water and ambient temperature measurement function. It can be widely used in water treatment industry, drinking water industry, home, travel, field work and so on as tools for water quality control and discrimination. Soluble salts, calcium ion, etc. Ionic organic compounds, ammonium acetate, sodium sulfate, etc. Heavy metal ions of chromium, zinc, copper, etc. Usually, the lower the total dissolved solids value is, the less soluble the water salts and heavy metal ions in the water, and the purer the water is. Specifications:Name: water quality test penModel: SOO-1Material: ABSColor: WhiteBattery: 2*AG13 button battery, 1.5V, 160mAh(Battery)Temperature range: 0-80C Measuring range: 0-9999ppmProduct size: 150*16*16mm/5.91*0.63*0.63inProduct weight: 28g/0.99ouncePackage size: 180*30*30mm/7.09*1.18*1, 18inPackage weight: 50g/1.76ouncePacking list:1*water quality test penMany questions about Dropshipping services are following:1. How many orders can you handle per day? We are a large company in Shenzhen, China, with a large warehouse that can handle large orders every day. We ship countless packages every day. We can guarantee the order you request.2. How fast can you process orders? We will arrange the shipment as soon as possible after you pay for your order. Priority delivery for dropshipping order3. Can you ship an order without any receipts, invoices and promotional offer inside the package? Absolutely! No invoices, receipts, promotional offer if you leave notes on the order (if you want, we can deliver.)4. If you need other products? We can supply most of the products you need as much as possible1If you have any other questions, please feel free to