Fitness, Running, Sweating, Armband

15-DAY BATTERY LIFE: Say goodbye to daily recharge. With a fully charged Amazfit Band 5, you don’t need to bring a charger for a two-week trip. On a single charge, it has enough power to get you charged for 2 whole weeks mind-free.BLOOD OXYGEN SATURATION MONITOR: You can measure your blood oxygen saturation and understand your physical state with OxygenBeatsTM. Ideal for high-intensity workouts and sports such as marathons and gym workouts. Specification:  Fabric name: Neoprene Main fabric composition: chlorinated fiber "chlorinated fiber" Main fabric composition: 75 (%) Function: sweating handguard