1ATM，GR5515I0ND，BT 5.3

Body material: Zinc Alloy + IBS Plastic Bottom Case

Strap material: Silicone or Nylon

Heart rate sensor: HS3918

G-sensor:Sensortek  STK8321-W

Function:Incoming call reminder，Find the Bracele，Clock，Shutter，24h Heart Rate, Sleeping, sleep monitoring,Sedentary reminder，107+ multiple sports modes,HRV monitoring

Battery capacity:  180mAh

Using time:30-35 days

APP: Da Rings / Da Halo