you can simultaneously charge them and transfer music

It is up to you how you connect it to your device

they deliver 45W and 15W of power respectively

for air vents

If you need to charge your smartphone while using this accessory

Cavo USB - Lightning con supporto magnetico technologies_anc you can simultaneously charge themHOLDER KEEPS THE CABLE TIDY AND ATTACHES TO ANY SURFACE This USB Lightning cable is always kept tidy and fixed thanks to the removable holder. The sticker on the back allows it to be attached to any surface. Use it on the desk of your office, study, classroom or on the nightstand in your bedroom to have the charging cable always at the right voltage. The anti tangle finish, prevents the formation of annoying knots. MAGNET LETS YOU TO ADJUST THE CABLE