Digi-Temp Digital Thermometer Checking your tanks temperature has never been easier! This stylish thermometer offers a constant digital display with +/- 1 Fahrenheit accuracy. They’re also completely wireless and submersible. Perfect for Nano Cubes and any aquarium that demands compact size with pinpoint accuracy. All probes are integrated and include a battery for plug-n-play. Advanced Features: Digital Display Offers round-the-clock temperature display. Wireless No More wires to get tangled! Submersible It’s completely submersible! The Digi-Temp is 100% waterproof Compact Size Amazingly compact and lightweight. Battery Your Digi-Temp includes a battery for instant start up and is completely safe for fresh & saltwater environments. Specifications Temperature Range: 32-99F Temperature Accuracy: +/-1 F Power Supply: LR44 Button Battery (Included)