This Generation 2 iPod shuffle released in Late 2007 was identical to the previous Early 2007 Generation 2 iPod shuffle, except they were available in silver and four new colors: light blue, light green, purple, and Special Edition (PRODUCT) RED. This example is light blue.
The Generation 2 iPod shuffle (Late 2007) model also added a new 2 GB model.
This iPod shuffle measured 1.07 inches tall, 0.98 inches wide, and 0.33 inches deep and included a built-in clip for easily attaching the iPod to clothing. All iPod shuffle models lack a display. This model incuded 1 GB of flash memory to hold approximately 240 songs.
A small USB dock shipped with this iPod shuffle that used the headphone jack to connect to power and synchronize music. Its battery lasted for about 12 hours.
Source: Everymac