How to switch vaping modes of Eleaf iStick QC 200W

When you vaping with the Eleaf iStick QC 200W, you can the mode you want. When your device is powered on, press the fire button 3 times in quick succession, the device will display current vaping mode. Press the up or down button to switch among VW, Smart, USB charge (this mode appears only when "USB" is on), TC-Ni, TC-SS, TCR-M2, TCR-M3 modes and then press the fire button once or stay in the interface for about 10 seconds to confirm the vaping mode you chose.