content of salts and acids dissolved in water, to help you confirm the quality of the water used daily. 【Background Radiation and Object Radiation Dose Detection】: The main measurement is the magnitude of the ionizing radiation dose (gamma rays and beta rays) and nuclear radiation. It supports the selection of the units of radiation measurement. It is also possible to change the volumes of the instrument. 【BT and APP Control】: You can turn on BT to connect the device to a smartphone and perform measurements using that application. (Note: After the device is connected to the smartphone app, it can only be controlled by your smartphone.) 【Auto Power Off】: Includes an auto power-off function and supports auto power-off time settings of 1, 3, 5, 10, 15, 20, and 30 minutes. The unit can enter sleep mode or resume working mode by pressing the power switch once. If the instrument has not been used for more than 40 seconds, it will automatically enter sleep mode after that time. 【Multiple Languages System】: Multi-language design, you can switch between English, Chinese, Russian, Ukrainian, and Arabic according to your usage habits. Specifications: Name: Nitrate Tester Material: metal Color: white, black (optional) Battery: 1 * built-in 720mah lithium battery (included) Nitrate measurement ranges: 0-9999mg/kg Measurement error: <10% TFT color display resolution: 320*240 Additional power: USB power cable USB charging current: 310M Charging voltage: 5V Usage time: 20H Working temperature: 0-60℃ Item size: 122 * 50 * 14mm / 4.80 * 1.97 * 0.55in Item weight: 85g / 3.00ounce Package size: 150 * 150 * 42mm / 5.91 * 5.91 * 1.65in Package weight: 250g / 8.82ounce Packing List: 1 * Nitrate Tester 1 * Cable 1 * Adapter 1 * Carrying Bag 1 * User Manual