Feature: 1. AGING RESISTANT AND DURABLE: LED fish tank thermometer is made of premium ABS material, anti aging and durable. 2. TEMPERATURE AND ACCURACY RANGE: Digital aquarium thermometer has a temperature range of ‑50°C to +70°C with an accuracy of +1.0°C. 3. BUILT IN SENSOR: 3D LCD aquarium thermometer has a built in sensor to accurately detect the temperature of the fish tank. 4. HIGH BRIGHTNESS SCREEN: Digital aquarium thermometer has a high brightness screen that is easy to read. 5. EASY TO INSTALL: Aquarium thermometer is easy to install on the aquarium wall. Small size, light weight, easy to carry. Specification: Item Type: Aquarium Thermometer Material: ABS Battery Type: 1 x LR1130 Button Cell (Shipped With Built In Battery) Battery Capacity: 70mAh Size: Approx. 1x7.1cm / 0.4x2.8in. Package List: 1 x Aquarium Thermometer Note: 1. Cannot be thrown into the water and stuck to the fish tank.2. Before use, gently pull the insulated battery, the temperature indicator will come out.3. The temperature difference between the aquarium wall and the fish tank is about 1 degree, but it does not affect the temperature measurement effect.4. Please allow some error due to manual measurement.