TDS Meter Digital Water Tester - Hofun TDS, EC & Temperature Meter 3 in 1, 0-9999 ppm Accurate, PPM Meter for Drinking Water Test, Coffee, Swimming Pool, Aquarium, RO/DI System, Hydroponics auspowers_batchone Not sure what type of

Not sure what type of control function you need

Overall length: 4

Ergonomic handle designThe convex groove on the inner side of the handle is fully ergonomically designed

Compact and portable: compact size manual hand drill is good to store in a toolbox or in pocket

TDS Meter Digital Water Tester - Hofun TDS, EC & Temperature Meter 3 in 1, 0-9999 ppm Accurate, PPM Meter for Drinking Water Test, Coffee, Swimming Pool, Aquarium, RO/DI System, Hydroponics auspowers_batchone Not sure what type ofTDS Meter Digital Water Tester Hofun TDS, EC & Temperature Meter 3 in 1, 0 9999 ppm Accurate, PPM Meter for Drinking Water Test, Coffee, Swimming Pool, Aquarium, RO DI System, Hydroponics Hofun TDS Water Quality Tester CONCERNED ABOUT YOUR WATER QUALITY? Hofun TDS Water Tester works like a guard who helps monitor water quality to tell you whether the water meets standards of drinking, aquarium, RO OI system, etc, so that you have a clear mind of water