The stylish second-generation Citizen CZ Smart Hybrid Sport smartwatch with 18-day battery life is smarter inside and out. With a sleek 42.5mm silver-tone stainless steel case, the CZ Smart Hybrid Sport smartwatch is now available with an interchangeable 22mm silver-tone stainless steel bracelet. Inspired by the rich design of Citizens iconic timepieces, CZ Smart marries innovative science from NASA and technology from IBM Watson with the style and quality you expect from Citizen. Call up Amazon Alexa with the built-in mic, track and monitor heart rate, and anticipate patterns of fatigue and alertness with Citizens proprietary wellness app YouQ. CZ Smart YouQ provides a 36-hour forecast ahead and offers highly personalized insights and suggested Power Fixes, actions to help you improve alertness and promote the building of better habits, readying you to meet whatever the day may bring. Additional functionality from the Citizen Connected App delivers the latest Golf Report and Live Sports. You can even sync to your Nest, or August, Yale Lock smart systems and other features through the Riiiver platform. Compatible with both iOS and Android, the CZ Smart Hybrid Sport smartwatch runs on the Citizen Connected app. Battery life varies based on usage. Supported features may vary between countries with compatibility subject to change. This device and its related software are not intended for use in the diagnosis, cure, mitigation, treatment or prevention of disease or other conditions.