1. Easy to Read: Quickly turn the device on/off with a button press, view accurate temperature readings on the userfriendly large screen, and easily switch temperature units by holding the button for 3 seconds. 2. BatteryPowered Design: The builtin button battery of the aquarium thermometer saves energy while delivering precise measurements. the LR44 battery after use to ensure continued accurate monitoring. 3. Easy Installation: Attach the aquarium thermometer to the outside of your aquarium wall using two suction cups for the wired model, or opt for the wireless version with an adhesive design for hassle setup and temperature readings. 4. Mini Design: Our compact aquarium thermometer allows discreet monitoring of your aquatic ecosystem. With wireless convenience, you can effortlessly track temperatures without disruption. Its small size won't block your view or interfere with your reptiles' activities.