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 1 pcs Built-in copper nickel-plated temperature sensor, precise and sensitive, accurate perception of changes per 0.1C The temperature range of 0-60°C, can meet different water temperatures, more convenient to use 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 Wireless design, no probe and messy wires in the water, with accurate temperature sensor on the back 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