1x Rubber probe. - The sensor is waterproof and is better for the freshwater tank than the saltwater tank. Connect with a heater and a cooler, heating socket for heater,cooling socket for cooler. - Temperature Resolution: 0.1 ° C / 0.1° F Temperature Accuracy: ±1°C (-50 ~ 70°C) / ±1°F (-50 ~ 160° F).
eBay