The IQOS 3 DUO lets you enjoy two consecutive uses before needing to recharge.
Once you’ve finished your first use, there’ll be one light  to show you have one more use left. If you’d like the second use right away, your IQOS Holder is instantly ready for you.
If you don’t need the second use right away, simply put your IQOS Holder back in the Pocket Charger for a quick recharge to give you two uses again.