I backed this Core along with the metal Time 2 watch with a 10 day battery. I have a Pebble Steel and get around a week on black and white. It works fine and I love it but the Time 2 is color with a better battery. I'm not sure how Pebble makes the best wearables around!!
This Core clips on your shirt and u talk into it to Alexa...kinda like Star Trek
Oh, and there's wireless charging on it too. Put $20 more into your pledge for the wireless charger and plate.
Marty