Xiaomi Haylou RS3 LS04 SmartwatchThe Xiaomi Haylou RS3 LS04 Smartwatch adopts an AMOLED display and aluminum alloy frame with a simple and elegant Bauhaus design, perfectly combining aesthetics and technology. Haylou RS3 supports a customized watch face function. Watch faces are updated continuously to satisfy your ever-changing style.SpO2 TrackingThe Haylou RS3 LS04 supports blood oxygen testing, helping you quickly adjust your status. Also, the low blood oxygen level can easily cause fatigue, lack of energy, and decreased concentration.14 Workout ModesThe Haylou RS3 features 14 workout modes and provides professional exercise reports like a personal trainer, making for more efficient exercise. The 14 works modes are Jogging, Fast walking, Biking, Climbing, Spinning, Yoga, Indoor running, Integrated training, Gymnastics, Basketball, Football, Rowing, Swimming pool, and Open water swimming.5 ATM Water-resistance & 21 Days Battery LifeThe Haylou RS3 is rated waterproof to 5 ATM with a metal frame and integral molding back shell design. High-performance lithium battery. Basic battery life mode can last for 21 days on a single charge, no need to carry a charger for travel.Real-Time Reminder & Music controlConnect mobile phone via Bluetooth. Instantly view calls, texts, and app notifications. Connect to the mobile phone. Control music with the watch: play/pause, previous/next track, etc...