The Smok Alien 220W features great OLED display and button layout. The OLED display on this mod displays your current setting ( wattage or temp control ), the battery life of your dual batteries, the voltage, the coil resistance, the puff counter, your current mode, and the type of coil that you have installed in your tank. Besides, there is also a counter that will display how long you are vaping. The buttons on the Alien 220W mod are located in a unique way to help avoid accidentally pressing any of the buttons. The firing button, or should we say firing bar, is located on the side of the mod. Thus, it can be easily clicked throughout the mod to easily fire the device.