The Firefly 2 has not only overtaken its predecessor in design. It is now 55% lighter, 33% smaller and heats up in 3 seconds. Whether you choose oils or herbs, the Firefly 2's steam quality is incredible. The Firefly 2 is controlled by a touch sensor. As a result, you run the risk that your device is unintentionally activated in your pocket. The 2 sensors are located on the side of the device and must be operated simultaneously to start the heating process. With the charging station with USB cable, the device can be fully charged in 45 minutes and connected to any USB 3.0 compatible port, convenient for on the go.