Ideal tool for indoor and outdoor plants(Most indoor plants prefer slightly acidic soil with a pH between 6.5 and 7.)Step Instructions: 1: Change humidity / pH / light positions. 2: Insert the probe about 2 4 inches into the ground. 3: Adjust the position of the probe until the pointer on the dial vibrates slightly.4: After 10 minutes, note the humidity / pH / light level in the dial. 5: Remove the probe from the ground and wipe it clean after each use. Specifications: Material: ABS Size: 27.5 x 6 x 3.5 cm Copper probe diameter: 5mm Aluminum probe diameter: 5mm Net weight of the product: 90 g Moisture range: 1-10 (1-3 dry, 4-7 wet, 8-10 wet) pH range: 3.5-8 pH (3.5-6.5 acidic, 7-8 alkaline) Light intensity: 0 2000 lux (0-200 Low, 200-500 Low+, 500-1000 Normal 1000-2000 high) Package includes: 1 x 3 in 1 Soil Tester Note: - The soil tester is only suitable for soil and cannot be placed directly in water. - Do not press on very hard ground or touch hard ground objects, as this can easily damage the probe. - Do not leave in the ground for a long time. 1 x 3 in 1 Soil Tester Note: - The soil tester is only suitable for soil and cannot be placed directly in water. - Do not press on very hard ground or touch hard ground objects, as this can easily damage the probe. - Do not leave in the ground for a long time. 1 x 3 in 1 Soil Tester Note: - The soil tester is only suitable for soil and cannot be placed directly in water. - Do not press on very hard ground or touch hard ground objects, as this can easily damage the probe. - Do not leave in the ground for a long time.