Glad to introduce the latest Joyetech eRoll Mac Simple Kit. The eRoll Mac is a simple pen style starter kit with portable size and cute appearance. Consisted of 180mAh built-in battery and Joyetech eRoll Mac Cartridge, the eRoll Mac Simple Kit supports 3.7V constant output with 11W max power. Plus the 1.2ohm ceramic integrated coil, it can be used with nic-salts e-juice. Get the Joyetech eRoll Mac kit and enjoy a simple yet elegant daily vaping.