Feature: 1. Accuracy: High accuracy sensor is preferred, temperature difference range of detection point is only ±0.1℃. 2. One Touch: LED digital display is bright when touched, just gently touch, you can know the real time temperature of the fish tank. 3. Long Lasting: This product requires a CR2032 button battery to use, low power consumption, once the battery can be used for 12 months. 4. Repeatedly Paste: Attached to the outer wall of the fish tank, the adhesive can be washed with water, paste without leaving a mark. 5. Convenient to Use: Screen is clear and easy to read, easy to install to the wall of the fish tank, easy to carry, small size and lightweight. Specification: ItemType: Aquarium Thermometer Material: ABS Size: Approx. 5.2x4.9cm / 2.0x1.9in Battery Type: Button Battery Capacity: 210 mA This Product Requires 1 CR2032 Button Battery to Use (shipped With Built In Battery) Temperature Range: 0~99.9℃ Temperature Measurement Accuracy: ±0.1℃. Package List: 1 x Aquarium Thermometer Note: Manual measurement, there will be 0.1‑0.2cm/0.04‑0.1in error.