The Apple Watch we got a glimpse at this week is a powerful peripheral device, but most of its tricks require it to be tethered to an iPhone in the user’s pocket. Last night on Charlie Rose, Apple CEO Tim Cook revealed one thing the Watch can do on its own: Send music to your Bluetooth headphones. Cook wore a white Apple Watch during the interview, and showed some of its features to Charlie Rose, who pointed out for viewers that the Watch requires an iPhone to be attached.