APP:Day day bracelet OS:Andriod 4.4 or above and IOS 8.0 or above Battery:Li-pol 50mah ,USB charger, half an hour charging time stand-by and use time:10 days stand-by time, 2 to 3 days use time Function:Heart Rate Monitoring activity tracking ...... net weigh:20g Color:Black,Blue,Green,Purple,Pink Bracelet si Show More...
APP:Day day bracelet OS:Andriod 4.4 or above and IOS 8.0 or above Battery:Li-pol 50mah ,USB charger, half an hour charging time stand-by and use time:10 days stand-by time, 2 to 3 days use time Function:Heart Rate Monitoring activity tracking ...... net weigh:20g Color:Black,Blue,Green,Purple,Pink Bracelet size:Bracelet size 50mm * 24mm * 11.6mm Wrist strap size:235mm * 24mm * 11.6mm sample:yes,it is wellcome