Andoer 80m/262ft Handheld Light Distance Meter Rangefinder Range Tester with Bubble Level Tape Measure Accuracy &plusmn;2mm Ideal for water TDS testing like aquariums, swimming pools, water filters, and more Measurement range of 0-9990ppm and 2% highly accurate and quick readings Data Hold Function: Freeze the measurement to view it out of the water Auto-off Function; Low power-consumption for years of reliable measurement Lightweight, handheld design; factory calibrated;CE/FCC/ROHS Approved; 2-Year warranty