3in1 multifuction Water Quality Purity Filter 0~19990ppm LCD digital 616 TDS meter EC tester -50C 70C Temp temperature monitor waterproof detector

note : this item comes without retail box

specifications
range: EC:0~19990us/cm
         TDS: 0~19990ppm
         temperature:-50℃?70℃(-58 ℉-158℉)
Resolution: EC:10us/cm
                     TDS: 10ppm
                    temperature:0.1℃(0.2℉)
accuracy : EC/ TDS ±2%F.S
              temperature:±0.1℃(±0.2℉)
battery: 4*1.5v(AG13)  not included
temperature compensation :0℃~50℃
dimensions: 188mm* 35mm *35mm
weight: 80g