Material: Plastic White size: 4.3cm/1.69\"*4.3cm/1.69\"*1.2cm/0.47\" Green size: 4.8cm/1.89\"*4.8cm/1.89\"*1.2cm/0.47\" Square white [degrees Celsius °C]: 0 °C-60 °C Product features 1. Built-in copper nickel-plated temperature sensor, precise and sensitive, accurate perception of changes per 0.1C 2, the temperature range of 0-60 °C, can meet different water temperatures, more convenient to use 3. one-handed mastery; The size as thin as 1 cm fits more closely to the cylinder wall and is easy to use 4. The appearance design is clean and concise, and the green large font display data reading is more intuitive 5. Built-in a 3V ultra-low-power lithium-manganese battery, which can be used for standby for about 5 years and durable and more energy-saving 6, wireless design, no probe and messy wires in the water, with accurate temperature sensor on the back 7, the aquarium thermometer attached to the outside of the glass container, below the water level, read the temperature suitable for fresh water, seawater, tap water and other types of water