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. WARNING:Please charge from a computer USB port or with a 5V 1A USB power adapter, please avoid any 2.1A fast charging or the charger will be fried.

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

HEALTH & FITNESS TRACKING: GPS tracker, heart-rate monitor, step counter, calories burned counter, speed & cadence monitor. NFC PAYMENTS: Use Google Pay to purchase directly from your wrist at millions of places without fumbling around for your wallet.

SMART SLEEP TRACKING: Download TicSleep app on the watch and check your sleep progress via mobvoi app on the phone. There is 30-day money-back guarantee for any reason, 12-month warranty for quality-related issues. If there is any issue about the watch, please do not worry and contact us via【[email protected]】or via Customer Service Hotline: +1 888-830-9974 (Monday to Friday 9:00-17:00 EST)