High precision TDS water electrolyzer electrolysis pen

it comes without retail box

we have EU plug， pls tell us the one you need，thanks

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.