Apple announced the seventh generation iPod Nano on September 12, 2012. The (maximum) internal storage capacity has not been increased compared with the previous model but only a single, 16GB version of the seventh generation iPod nano was announced at the product launch. It has been described as the "thinnest iPod nano yet" — it's 38% thinner (5.4mm) than the nano it replaces (8.78mm).
The headline features announced are:
2.5" multi-touch LCD screen with a resolution of 240x432
User-configurable maximum volume limit.
FM Radio, Apple EarPods.
Proprietary Lightning connector, stereo minijack.
Supports 720p video playback @ 30 fps.
Supported audio formats: AAC (8 to 320 kbit/s), Protected AAC (from iTunes Store), HE-AAC, MP3 (8 to 320 kbit/s), MP3 VBR, Audible (formats 2, 3, 4, Audible Enhanced Audio, AAX, and AAX+), Apple Lossless, AIFF, and WAV.
Supported video codecs: H.264 and MP4.
Non-replaceable lithium-ion battery; 30 hours of music playback and 3.5 hours of video playback on a single charge.