Mini Wireless Aquarium Thermometer

This digital aquarium thermometer measures water temperature accurately from 0°C to 60°C with 0.1°C resolution, using a built-in copper-nickel plated probe. It features a compact circular design with a diameter of approximately 48 mm (1.89 inches) and a slim profile of about 12 mm (0.47 inches), enabling secure adhesion to the outside of glass or acrylic fish tanks. The device uses an ultra-low-power 3V button battery providing up to 5 years of standby life. Its LED display shows large green digits for clear visibility day or night; pressing the button activates the reading, which auto-sleeps after 5 seconds to conserve power. Designed exclusively for external tank mounting — no wires, no probes inside water, no risk of electrical hazards or cable clutter.