【 2 Large Dual Displays 】 With 2 large displays you can easily read your settings so they are always where you have them. 【Ultra Precision】Always spray the right amount at the right time for your plants to be correct. This aquarium CO2 regulator can control your aquatic plants in their growth stages. 【High Accuracy】The good design of this regulator ensures that you always get the exact amount of CO2. 【High Quality】High quality material and long service life. Robust and compact construction. 【We deliver the best development state】 Perfect CO2 controller to create the best development conditions for your aquarium plants.