LONG BATTERY LIFE: 2-30 days on a single charge is achieved by dual layered technology and two modes. Smart Mode will get you 2-days of battery life and Essential Mode will achieve 30-days of battery life. If Auto Switch to Essential Mode is turned on, then 5-days of battery life will be achieved.
SMART MODE: Wear OS by Google, AMOLED display, Google Assistant, thousands of apps and watch faces through Google Play store, health & fitness tracking
ESSENTIAL MODE: Power saving FSTN LCD display, high sunlight visibility, shows essential information including time / date / step counter / heart rate