Featuresr smart bracelet with the perfect conbination of bluetooth headsetr 091inch oled screen bigger displayr nordiccsr chipset and higher performance safety and stabler 24 hours activity tracking time record every movementr blutooth v40 working range up to 10 metersr sophisticated technology life waterproof and dustproof swim or shower is not suggestedr 100mah lithium ion battery capacityr information to remind function fully compatible with android or ios systemr support