Apple first announced the new MagSafe product line at its October event, but the Duo didn’t become available for purchase until early this month. As the name suggests, the $ 129 model can charge two devices at once. It even works with the Apple Watch, unlike the MagSafe solo charger, which doesn’t. Since it doesn’t come with an AC adapter, you can use your own – unless it’s Apple’s 29W model, apparently. The company, however, recommends compatible 20W adapters for wireless charging up to 11W or 27W adapters for wireless charging up to 14W.