Dr.meter [Upgrade Version] 3 in 1 Soil Moisture Meter, Light and Soil PH Acidity Tester, Soil Tester Kit Tools for Garden, Farm, Lawn,Home, Indoor & Outdoor (No Battery Needed) (1010BS) Precise and easy readout. High accuracy in measuring. LSI-circuit use provides high reliability and durability. Permits a wide range of light measurements Adjusting zero automatically and excellent operation. LCD display provides low power consumption and clearly read out evening high ambient light. Separate LIGHT SENSOR allows user take measurements at an optimum position;