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. 1 x Aquarium Thermometer  ItemType: Aquarium ThermometerMaterial: ABSSize: Approx. 5.2x 4.9cm / 2.0x 1.9in Battery Type: Button BatteryCapacity: 210 mAThis Product Requires 1 CR2032 Button Battery to Use (shipped With Built In Battery)Temperature Range: 0~ 99.9℃Temperature Measurement Accuracy: ± 0.1℃