These portable instruments incorporate state-of-the-art technology to quickly and accurately determine the concentration of multiple parameters. The readings are shown in large digits on a clear LCD, eliminating inconsistency in interpreting results. A cuvet cap is supplied with the meter to prevent outside light from interfering with the measurements. Includes 9 volt battery and has auto-shut off. Use these units as time and cost-saving alternatives to several chemical test kits. Kits perform 100 tests. Warranty: 2 years.