• 【8-12 hours tracking】: continuously tracking and recording oxygen level, heart rate and motion every minute, continuously using up to 8-12 hours.
  
• 【Buit-in Memory】：Oxylink oximeter stores four records on device, up to ten hours for each. You don't need to worry about data storage even if your phone isn't around.
  
• 【Free app for ios and android】: unlimited storage in app vihealth, viewing real-time blood o2 & heart rate in app dashboard. connect the device with app via bluetooth.
  
• 【Audio reminder in app dashboard】: the audio reminder in app dashboard will be triggered when o2 level falls below the pre-set threshold. the reminder works only when your phone stayed in dashboard and not locked.
  
• 【Audio reminder in device】: the audio reminder in device will be triggered when the o2 level falls below the pre-set threshold, prevent from a low-o2 status. you can adjust the volume and o2 threshold in app.
  
• 【Comfortable soft ring sensor】: the lightest, smallest ring sensor for overnight continuous monitoring, durable and adapt to most fingers.
  
• 【Note】: This device is for Sports and Aviation use only and not intended for medical use.(Please use just before and after exercise, do not use while vigorous exercising)

• Model：Oxylink
  
• Weight：18g/0.63oz
  
• Device Dimensions：1.7'' X 1.0'' X 0.6''
  
• Ring Perimeter：2''~3''/50~76mm
  
• Measure Interval：1s
  
• Display Interval In App Data Chart：1min
  
• Built-in Storage：4 Sessions, Up To 10 Hours For Each
• Battery Type：Rechargeable Lithium-polymer Battery
  
• Battery Life：8-12 Hours For Typical Use
• Wireless：Bluetooth
  
• Works With：Ios 9.0 Or Above, Iphone 4s / Ipad 3 Or Above; Android 5.0 Or Above
  
• Audio Alarm From Device For：Low Oxygen Levels
  
• Audio Alarm On Phone For：Low Oxygen Levels
  
• Oxygen Level Range：70%-100%
• Heart Rate Range：30 To 250 Bpm