c6 sports bracelet intelligent heart rate sleep health monitoring bluetooth waterproof meter step caller id table

model: c6 application platform: android platform, fully compatible, apple ios platform compatible platform: android, alibaba cloud os, baidu cloud os, miui, ios applicable crowd: adult, public, fashion, business, old man screen size: 0.69 inches appearance size: 225mm*16mm*10mm material: tpu battery capacity: 45mah product weight: 4.2g interface: usb 2 packing list: machine + charging line + manual function: heart rate monitoring