3 in 1: test soil moisture, light and pH levels with the practical 3-way meter. NO BATTERY REQUIRED: Just push the meter into the ground and get your reading. There is no need for batteries. Wide application: knowing when to change or to water, pH value, lighting for your garden, flowers, plants indoors and outdoors. Take the Guess work out of your garden watering light, and moisture. Save water, energy and keep your plants, lawns, flowers in top condition. Measurement of moisture at root level. Moisture readings register on a scale from 1 (dry) to 10 (damp), light readings range from 0 (low light) to 2000 (very strong light), and pH readings range between pH 3.5 (acidi) and pH 8 (Basic). Size: 11″ × 8″ × 2″ high quality 1 year guarantee.