Water Electrolyzer/Electrolytic Device Testing Meter+TDS Meter Filter Pen New LCD Digital TDS3  calibrate by hold /temp

NOTE : 2 PCS =1 PCS Electrolyte + 1 PCS TDS

it comes without retail box

Features:
Easy to operate and quick， obvious to get result
Provides a simple way to test water quality
provide us with the simple and cheap way to test water quality.
Used to test the water purity level，the client can see the condition of drinking warter.
High precision

Uasge method :
Water quality electrolyzer provides us with a simple and cheap way to test water
quality . For the examination of water quality ，you need take two cups(100~150ml，transparent，
one cup holds well or tap water， the other cup holds purified water) and emissions on the table.Then put two ends of the tool inyo two cups ，press the button ON ，the test begins.Usually， the test time is 30 seconds.