Sony's Smartband Talk is a smart fitness band that features a 1.4" monochrome E Ink display, an ARM M4 CPU and 2MB of flash memory. It connects to Android devices (4.4+) via NFC or Bluetooth and can last for three days between charges.

The Smartband talk will be released towards the end of 2014 for €160 ($210).

E Ink display info: 
1.4" E Ink
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ynvisible ink kit - create your own electrochrommic printed displaysynvisible ink kit - create your own electrochrommic printed displays