Bluelab Soil pH Pen Environment Controllers The U2 and U4 are

The U2 and U4 are a set of ultraviolet LED bars designed for use as supplemental lighting to enhance light quality

Package Dimension: 22

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50Hz 3A 660W

Bluelab Soil pH Pen Environment Controllers The U2 and U4 areBluelab Soil pH Pen Details The ultimate handy solution for measuring soil pH and temperature! The Bluelab Soil pH Pen provides a pH and temperature reading of soils and media, so you know that the right nutrients will be made available to your plants. In soils or growing media, pH strongly influences the availability of the microorganisms to plants in the soil. Now you can closely monitor and adjust the pH levels to optimize plant health and