Features:
<br />  1) Connection mode: Bluetooth 4.0
<br />   2) Battery capacity: 157mAH
<br />   3) Standby time: 5 days
<br />   4) Suitable for young and middle aged white collar workers and old people
<br />   5) Bracelet length: 247mm
<br />   6)Adjustable length: 145mm to 209mm
<br />   7)Waterproof gra  de: IP54  (Don't take a shower or wash clean with suggestions)   
<br />Package Content:
<br />(1) Normal One
<br />1 x 37 degree bracelet
<br />1 x wrist strap
<br />1 x manual
<br />1xBuckle