WHY CHOOSE AGPTEK LW31? 1.69-inch HD Screen. All your info, right here in clarity. Personalized Watch Faces. Wear your taste and personality on your wrist.Watch Your HR & SpO2. Keep track of heart rhythm and blood oxygen saturation and help to safeguard your health.Optimize Your Sleep. Automatically track your sleep at every stage of sleep (light, deep and wake up) to assist you improve your sleeping quality.Never Miss A Thing. Notifications of calls, messages, emails and social Apps, or even alarm, timer and stopwatch.Get Fitter, Get Better. Supports 11 sports modes. Pick your favorite sport, and push you further towards your goal.You Have A Buddy. Want to know your every-day steps, distance, calorie burns or active time? Just bring LW31 and off you go.Live Free, Splash Away. Get Wet? No Problem! Enjoy your workout in the rain or shallow swimming pool. The Longer, The Better. Up to 10 days battery life from only a 2-hour battery charge.