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(No Battery Needed) 3 in 1 Soil Moisture Meter + Ph Tester + Light Sensor Plant Care Soil Tester for Home, Garden, Flower, Lawn, Farm, Plants, Herbs, Gardening, Indoor, Outdoors Soil pH Meter Instrument Tool. PH Range: 3.5-8 Ph (3.5-6.5 ACID, 7 NOR, 7-8 ALKALI) Moisture Range: 1-10 (1-3 DRY, 4-7 NOR, 8-10 WET) Relative Light: 0-2000 Lux (0-200 LOW, 200-500LOW+, 500-1000 NOR 1000-2000 HGH) Material: Plastic Size: 285 X 50 X 38 mm/11.22 X 1.97 X 1.5 inch Probe length: 205mm/8.07 inch Color: Green Easy to use: Step 1: Switch moisture/pH/light position Step 2: Stick the probe into the soil about 2-4 inches Step 3: Adjust the position of the probe until the pointer on the dial swing slightly Step 4: After 10 minutes, Note moisture/pH/light level in the dial Step 5: Remove probe from soil and wipe clean after each use.