The 4-in-1 soil analyzer is mainly used to test soil ph, moisture humidity, temperature and plant light intensity. It USES a 9V carbon battery with a simple operation and a probe length of 205mm. This instrument is suitable for outdoor & indoor plants flowers, grasses planting and Garden virescence. Specifications: Name:4 in 1 Soil Instrument Test objects: Sunlight, moisture, PH value, temperature PH measure range : 4.0- 10.0(display resolution 0.1) Power supply: 9Vbattery*1 (battery is not included) Operating temperature: +5 ~ +40C Working humidity: 5% ~ 95% RH ,non-condensing Size Main unit: 55mm x 300mm Test probe: 205mm/ 8.07inch Tips: To avoid damaging the electrode, clean the electrode after each use, do not use in soil with and insert forcibly. Material: Plastic colour: As shown Package Contents: 1 x Soil PH Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.