Manufacturer Refurbished O2 Max Pulse Oximeter with Ring Sensor 72h Battery Life

• 【Free App and Software for Android, iOS, and PC】： The \"Vihealth\" app and \"O2 Insight Pro\" software allow you to easily share your daily data history or monitor your real-time oxygen levels (O2) and heart rate on your phone, tablet, or computer. Please download \"Vihealth\" from the Apple Store or Google Play.
• 【Intelligent Vibration and Audio Reminder】：The adjustable vibration and audio reminder gently alerts you when your blood oxygen level falls below your defined value.
• 【All-day Monitoring】： The Checkme O2 Max accurately records your oxygen levels (blood oxygen saturation), pulse rate, and movements.
• 【Comfortable Patented Ring Sensor】：The soft silicone ring sensor ensures your finger does not go numb and never slips off, keeping your finger completely free.
• 【Up to 72 Hours of Use】：No AAA batteries required, no need to keep batteries nearby. Continuous use for up to 9 nights (72 hours) on a single charge, with a one-year warranty.
• 【Built-in Memory】：The O2Max oxygen monitor stores four sets of 10-hour data. When the device is connected to the app via Bluetooth, the data is automatically uploaded.
• 【NOTE】：This is not a medical device. This device is intended for sports and aviation use only and is not for medical (MAIN DEVICE): 0.63 oz / 18g
  
• DEVICE DIMENSIONS: 1.9\'\' x 1.0\'\' x 0.7\'\'
  
• RING SIZE: 2.0\'\' - 3.0\'\'
  
• WIRELESS: Bluetooth 4.0 BLE
  
• BATTERY LIFE: Rechargeable lithium-polymer, 3.7V DC, 72 hours with normal use
  
• DUST AND WATER RESISTANCE RATING: IP22
  
• RECORDED PARAMETERS: Oxygen level, pulse rate, movement
  
• COMPATIBLE COMPUTER SYSTEMS: Windows 7/8/10; macOS 10.15.3 or higher
  
• COMPATIBLE WITH: iOS 9.0 or higher, iPhone 4s/iPad 3 or higher; Android 5.0 or higher, with
• Bluetooth 4.0 BLE
  
• OXYGEN LEVEL RANGE: 70% - 100%
  
• PULSE RATE RANGE: 30 to 250 bpm
  
• MEASUREMENT INTERVAL: 1 second
  
• DISPLAY INTERVAL IN THE APP: 2 seconds
  
• BUILT-IN MEMORY: 4 recordings, each up to 10 hours

• 1X Device host
  
• 1X SpO2 probe
  
• 1X USB data cable (micro)
  
• 1X User manual

On Sep 23, 2026 at 03:29:45 PDT, seller added the following information: