Product Description: Function:Passometer,Fitness Tracker,Sleep Tracker,Message Reminder,Call Reminder,Remote Control,Alarm Clock,Calendar,Week,Heart Rate Tracker,Activity Tracker Application Age Group:Adult Waterproof Grade:IP67 Compatibility:Android 4.3 or IOS8.0 or later Battery Type:90mA Polymer Lithium-ion Style:Sport Touch Screen:Yes Screen Style:Rectangle/Square-shape Bluetooth Standard:Bluetooth 4.0 APP:Better Living/YOHO Band Detachable:Yes Screen Type:0.96 HD Color Screen Package Included: 1 x Smart Wristband Notes: 1.Transition:1cm=10mm=0.39inch,1g=0.001kg=0.0022lb=0.035oz. 2.Due to the screen difference,the color may be a little different from what you expect,please allow it.