Heart rate sensor: check your heart rate, Intelligent monitoring of the sleep quality, walk tracker, data counting, heartbeat Sms: bluetooth sync reminders, sms notifications, distance calculator, share health data Features 360 degree¸ motion sensor, 3-axis accelerometer IMPORTANT: Please charge the device for at least 1 hour before first use. HOW TO USE: Download yoho sprot app from Play store or App Store. All android phones, iPhone X, iPhone7,iPhone 8 Plus,iphone xs,iPhone xs max,iPhone XRFeatures Smart Bracelet Sleep Fitness Tracker Pedometer Wristband **charged by putting its monitoring device directly to the adapter of a normal phone charger