For Andriod Phone, OS must be 4.4 or above and Bluetooth must be V4.0
<br />For ios phone, iOS must be 8.0 or above and Bluetooth must be V4.0.
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<br />Multi-function characteristics:
<br /> . Heart rate;  . Blood oxygen;  . Blood pressure measurement;  . Fatigue measurement;  . Sports step counter;  . Energy consumption;  . Daily mileage;  . Sleep monitorin;  . Call ID;  . SMS Reminder;  . APP Reminder;  .Sedentary reminded;  .Alarm clock reminder
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<br />Specifications 
<br />Model  R5 Smart Bracelet(heart rate) 
<br />Bluetooth V4.0
<br />Screen: OLED; Waterproof: IP67
<br />Wristband Material: PC Plastic+Silicone
<br />Band Leght approx  19.8mm
<br />Screen Size approx : 0.86inch
<br />Battery:60mAh Li-battery; Battery Duration:3-5days.
<br />Productst1 x R5 PRO Smart Bracelet: 1 x Gift Box + 1 x Charger + 1 x User Manual.<p> <b><b><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-1-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-2-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-3-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-4-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-5-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-6-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-7-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-8-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-9-large.jpghttps://contestimg.wish.com/api/webimage/58db6e1efbc9457059c05943-10-large.jpg></b></b></p>