1、The redox potential tester is made of high‑quality ABS material, which is durable and wear‑resistant. 2、Equipped with backlit display, easy to read, not affect the use in the dark. 3、Water ORP meter is easy to operate, more convenient, and cost‑effective. 4、It is widely used in swimming pools, fisheries, drinking water, laboratories. 5、The test pen has good performance, high stability and accurate testing. 1 x Tester1 x Adapter1 x Electrode1 x Screwdriver1 x Manual Item type: ORP MeterMaterial: ABSWeight: Approx. 388g / 13.7oz Uses: widely used in swimming pools, fisheries, drinking water, laboratoriesRange: 0~±1999 mvAccuracy: ±5 mvWorking Temperature: 0℃~ 50℃Battery Attributes: built-in battery 9V 200MAHAdapter: EU Plug 230-240VHow to Use: connect the adapter and the electrode, and put the electrode in the liquid to be tested (please refer to the manual for details).