The BT-01 thermometer is easy to read and features a safety zone indicator for most tropical aquarium fish. The BT-01 thermometer is equipped with suction cups to secure it in the tank at all times. It operates wirelessly with an integrated probe for ease of use. Small and compact, it has a very sleek appearance. Ideal for both freshwater and saltwater aquariums. Completely sealed with no leakage. Provides accurate results. With this device, you can immediately identify what is troubling your fish, intervene in the situation, and save their lives. BOYU Series: Aquatic Fish Color: White Material: Polyester 100% new and high quality Made of glass Slim and elegant design Product length (cm): 15 Product width (cm): 7 Product height (cm): 3 Weight (kg): 0.1