Jawbone UP onyx medium Designed to be worn 24/7, with up to 10 days of battery life Uses advanced sensor technology to track sleep and activity Log what you eat and drink to track nutritional info Get personalised insights that help you set and achieve your goals Compatibility with: iPhone 3GS or later, iPod Touch 3rd Gen or later, iPad, iOS 5.0 or greater, Android 4.0+ (Ice Cream Sandwich)