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★Features: ✔moisture meter ✔pH acidity measurement ✔light sensor ✔No battery needed ✔Indoor or outdoor use ★Specifications: ▶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 HIGH) ▶Size: 6 x 28 x 5cm [2.36 x 11 x 2"] ★How to use: ●Moisture Test Push switch to the left "MOIST". Insert probe deeply into soil reaching root level.Keep probe close to plant ●Light Test Push switch to the center "LIGHT". Facing the light source, hold the meter next to the plant ●Soil PH Test Push the switch to the right "PH". Insert probe deeply into soil ★Warm Tips: ① Do not touch the stone or hard rock soil, if the soil is too hard and dry, easy to damage the probes ② Design for testing soil only ③ After using, need to clean and wipe the probes ④ Measurement of moisture and pH must be viewed while the unit is in the soil,And the tester must be kept in the soil for 10 minutes or more