Press and hold the Mode Button to display battery level. Release then press and hold again to display current heat setting, indicated by flashing LEDs. Press the Mode Button repeatedly to cycle through preset temperatures. When using dry herbs, 2 flashing amber LEDs is the default heat setting. To increase vapor intensity select the higher preset, indicated by 3 flashing amber LEDs. For lighter vapor reduce to low, indicated by 1 amber LED. The concentrate preset is indicated by 3 flashing red LEDs. The temperature can also be changed and customized in the GHOST App.