Biturbo Mech is a powerful device that has the ability to fire two RDAs at the same time for greater vapor productions. Users can add two flavors e-liquid into RDAs and enjoy a complex and unique taste. The device is equipped with buttons for channel selection at the bottom, which allows users to choose between using one RDA or two RDAs. And the dual LED lights enables users to know the usage of this device better. All of these are designed to provide you with an unbeatable taste and quality. Innovation leads to changing life!