All the portable models are designed for travel, folding up neatly to fit into matching compact travel cases. That’s because the AirPods charging pad on the bi-fold is hidden behind the more able iPhone adjustable charging stand. Simon JaryThe Roam and Orange/Teal 3-in-1 Travel Charger differ from the Black and Pink versions by hosting the AirPods charging pad behind the orange adjustable iPhone wireless charging stand. The Pink and Black models charge the iPhone only in a flat position, but all three allow the Watch to sit up in Nightstand Mode. The Roam and Orange/Teal models features the stand but can also charge the iPhone flat if you prefer.