The item is a wireless digital swimming pool thermometer which can floating on the water. This product is constructed with plastic material for and practical use, directly with water. It offers more accurate measurements. Features - Color: Black. - Material: Plastic. - Size: About 14 x 8x 2.5 cm. / 5.51 x 3.14 x 0.98 inch. - Visual Field wireless transmission line ( ) : 100 feet - Made from material, safe and durable. - It can directly with water, water proof and able to float on the the water. - Suitable for measuring water temperature in swimming pool, bath, fish tank, etc. - Easy to use. Just put it on your swimming pool, or anything you might want to use, it will begin to get the temperature. - It is a practical tool and won’t take up too much space. -This product is required to be waterproof. When you set it up. The waterproof ring is required to be installed. Screw on the cap. (Installation method of waterproof ring: first, insert the waterproof ring into the groove of the cover completely, and then close it tightly.) Package list: 1 x Pool Thermometer