Specification parameters and function: battery capacity: 100mah Battery type: lithium polymer battery Display: High definition color screen  APP: excellent bracelet                          Device requirements: support for Android4.3 with bluetooth 4.0 or IOS8.0 or above                                                           Color: black, blue, red, purple, cyan              Function:                                   Dynamic heart rate, blood pressure testing, step motion meter (3 d sensor), calories, distance, bluetooth links, phone calls reminding, information remind, raised my hand against the bright screen, smart alarm clock, looking for bracelets, remote picture, sedentary remind, sleep monitoring, information push (SMS, WeChat, QQ, Facebook, Twitter, WhatsAPP, etc.) information read the packing specification:           The single color box package contains bracelet: 8cm*13cm*31cm   82g case volume: 42.5*32*29cm   Gross weight: 9kg per box number: 100PCS per box size: total 26*1.9cm, host: 4.1*1.2* 1.9cmapp support: China, Britain, Spain, France, Portugal, Netherlands, Germany, Russia, language of message content push support: China, Britain, Spain, Germany, France, Portugal, etc