New 21.5-inch Retina 4K models expected.
Nike+ Heart Rate Monitor Coming for Fifth-Generation iPod Nano?
AppleInsider notes that a newly-posted Nike + iPod User Guide (PDF) contains a reference to an as-yet unavailable heart rate monitor that will apparently only be compatible with the new fifth-generation iPod nano launched yesterday at Apple's "It's Only Rock and Roll" media event. The reference, found on Page 20 of the user guide, is part of a section entitled "Linking a Nike + iPod Compatible Remote or Heart Rate Monitor".
Nike + iPod compatible devices are sold separately from the Nike + iPod Sport Kit and the Nike + iPod Sensor.
You can use a compatible remote to control Nike + iPod wirelessly while you work out.
iPod nano (5th generation only) also supports Nike + iPod compatible heart rate monitors.
To link to a Nike+ compatible heart rate monitor (sold separately):
iPod nano (5th generation only): Connect your Nike + iPod receiver to your iPod nano, choose Nike + iPod > Settings > Heart Rate Monitor > Link, then follow the onscreen instructions.