Portable food safety detector, a revolutionary food safety monitor that protects ourselves and our children from particulate impurities, nitrates and nitrites. It takes only 3 seconds to detect unreasonable fruits and vegetables. It calculates the nitrite concentration in fruits and vegetables through precise conductivity test and gives corresponding prompts and warnings. Guaranteed authenticity, with it, we can better enjoy green and healthy life. which connects to mobile apps , detects fruits, vegetables, meat, water Nitrate measurement range: 0 - 9999 mg/kg TDS measurement range: 0 - 999 ppm Measurement time for nitrate concentration:3 sec Power source:Li-ion battery Operating temperature: 0 - +60 °C Measurement margin of error: Less than 10% Battery capacity:65 mAh Addional power source:USB USB charge current: 25 mA USB power supply:5V Usage time:up to 3 hours Colour:White Material:ABS Size:about 100 x 30 x 18mm Package Contents: 1X Host 1X USB charging cable 1X English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.