color as shown Size12*5*5cm Weight10gramm (2 piece set) is the perfect fit for all plant lovers who dont know how often to water their plants. Developed, designed and made in Japan. Detects water at the roots, no more dirty fingers and damaged roots trying to measure soil moisture with your fingers. Simple to use: leave the device in the pot and it will constantly monitor the soil moisture and indicate when the plant needs water. will change color from blue to white as soon as the plant needs water. Suitable for all types of plants, all types of soil and all sizes of pots. The award-winning design is simple and minimalistic, so it doesnt detract from the beauty of your plants. is the only irrigation indicator based on the pF value (available water capacity). Professionals measure the pF value with expensive devices, but you can also go pro with it. requires no batteries and is environmentally friendly. The inner core can be replaced manually. Depending on the type of soil used, the inner core lasts from 6 to 24 months. Materials: polycarbonate (outer body), non-woven cotton (inner core).