Joyetech ESPION mod has a business style designed which makes you distinguished from your peers. It features 1.45inch large TFT color display and user-friendly interface which presents the relevant parameters more clearly. It requires dual 18650 cells and support 200W maximum output. The new function button is easy to operate and it can lock the power when you turn off the function button. Equalizing charge technology is applied in order to bring all cells to an equal state of charge. This mod also can upgrade firmware.