It keeps my fish tank CO2 injector running perfectly and puts my mind at ease regarding overdosing

2 (AAA) batteries and lanyard

Total Chlorine

Brand: HM Digital

dry place away from direct sunlight

Milwaukee MW802 PRO 3-in-1 pH/EC/TDS Meter Bundle – Hard Case + Calibration Solutions Included soil conductivity meter It keeps my fish tankMilwaukee MW802 PRO Bundle: Professional pH EC TDS Meter + Hard Carrying Case Get complete protection for your investment with this exclusive bundle featuring the Milwaukee MW802 PRO 3 in 1 combo meter and a premium MI0028 hard carrying case. Designed specifically for hydroponics, aquaponics, and greenhouse growers, this professional grade testing solution delivers lab quality accuracy with unmatched portability and protection. Bundle Includes