The L1 200W TC Box Mod by Laisimo is a durable, feature filled, and high performing mod that is taking over the industry! The device gives you the capability of connecting the device directly to your phone with its Bluetooth 4.0 feature. With the Bluetooth feature, you are able to make changes to the temperature control, change the power, limit your puff intake, and view individualized puff reports (with app download). The temperature control mode supports Titanium, Stainless Steel, and Nickel heating elements. The L1 requires two 18650 batteries which can be easily swapped out with the magnetic battery door feature. The device also has a Micro USB port so that you can keep your firmware up to date with future firmware updates.