china factory supplyInstrument Box 2019 newest M3 waistband smart bracelet with blood pressure heart rate monitor and sport supervise for child and students smart watch wrist watch watch phonefeaturemodelM3weight18.4ggross weight37g/setdimension255mm L*18mm W*12MM TCPU8266RAMrom 512K ram 16Kdisplay0.9Security & Protection 6"TFTbuttonsingle dot touchhardware specG-SENSORRT30Color Card & Color Comparator 00Bbattery80MAbattery interfaceUSBvibration motor0827 wired motorbluetooth4.0software speccompatiable systemandroid/IOSmain functionstep countinngsupportdistance countingsupportcarolie comsuptionsupportsleep countingsupportlong-sit remindsupportheart rate monitorsupportblood pressure monitorsupportQQ message remindsupportwechat message remindsupportcall remindsupportsms remindsupportalarmsupportphoto takingsupportintelligent lose preventionsupportfind waistbandsupporttime synchornizationsupportraise up to light displaysupportOTA updatesupportcarton dimension70*23.5*19.5cm/100PCS/3.6kgEXW shenzhen price$4.5MOQ200