This awesome iNecklace simulates the Apple “breathing” LED pattern! It’s also 100% open source with the source code, circuit board files, schematics and CAD files posted on GitHub for you to customize to your hearts content!

Aluminum pendant on 18″ sterling silver chain.
CR1220 battery lasts up to 72 hours.
LED is totally programmable to do your bidding.
All iNecklace code is available on GitHub!
Perfect for the geeky girl in your life!