Features: Made of high quality material, not easy to break, sturdy and durable in use. Mini size, compact design and easy to use, does not occupy much space. Submersible suction cup, easy to install and convenient to use. Built-in high precision temperature probe, real-time understanding of the temperature of the aquarium. Large digital display, a practical thermometer suitable for fish tank and aquarium use. Specification: Condition: 100% Brand New Housing Material: ABS Color: Green Purpose: Temperature Measurement Measuring Range: 0-50 Measuring Accuracy: Approx. 1 Extreme Diving Depth: 30cm Operating Ambient Temperature: 0-70 Battery: 1 * LR44 Button Battery (Included) Size: Approx. 5.8*4 cm / 2.3*1.6 in Package list: 1 * Aquarium Thermometer (Battery Included) Note: 1. Please allow 1-2 mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. When putting the thermometer into water, tighten the back cover to make it waterproof and safer..