Brand Name :NAIKU Function :Blood Pressure,Passometer,Sleep Tracker,Calendar,Push Message,Heart Rate Tracker,Blood Oxygen,Alarm Clock,Remote Control,Activity Tracker,Fitness Tracker,Message Reminder,Week,Call Reminder Language :Spanish,English,Russian,Polish,Portuguese,Italian,French,German,Japanese,Ukrainian,Hebrew,Korean,Turkish Compatibility :All Compatible Touch Screen :Yes Waterproof Grade :Life Waterproof Band Material :Silica Screen Type :Color LCD Application Age Group :Adult Style :Fashion Model :HI16 Smart bracelet Screen Style :Rectangle/Square-shape Case Material :PLASTIC Band Detachable :Yes Color :blue black red white Screen size :1.3inch Battery Capacity :180 mAh App OS :IOS 8.0 or higher, Android 4.4 or higher system Screen resolution :240px*240px Product size :257mm*35mm Waterproof :IP67 Feature :heart rate fitness tracker