B7 Mini Smart Ring Watch with Interchangeable Stainless Steel and Nylon Straps

Product Description : 

• device that can be worn on a finger or strapped to a wrist, bringing heart-rate and sleep tracking to a ring-watch format. The pricing undercuts ring watches from Casio and Timex that have largely stayed closer to novelty timepieces, 
  sits in the middle of two camps. Ring watches give you a screen, but often not much else; smart rings track health, but usually skip displays and lean on the phone app.
• uses a 0.49-inch OLED display — a small, bright, low-power screen — and an adjustable Milanese-style metal mesh band, with a strap that can be swapped to wear it like a mini smartwatch. The site said is pitching heart-rate and blood oxygen saturation (SpO2) sensors, sleep and cycle tracking (often used for menstrual cycle tracking), and more than 100 sports modes, along with a 5 ATM water-resistance rating — roughly 50 metres — plus a claimed five-day battery life and a one-hour charge. 
  
• highlighted the same swap-and-wear setup and said the screen shows step count, time, heart rate, sleep data and blood-oxygen readings. It also said the device is compatible with Android and iOS phones and will be sold in gold, silver and black finishes. 3
  
• not support Bluetooth calling,
• Type: 2-in-1 Smart Fitness Watch with Smart Ring
  
• Screen: 0.49-inch OLED
  
• CPU Model: RTL8762CK
  
• Bluetooth: 5.1
  
• G-Sensor: SC7A20H
  
• App: QWatch Pro
  
• Battery Capacity: 28mAh
  
• Material: Zinc Alloy + Epoxy Resin
  
• Working Time: Approximately 3-5 days
  
• Charging Method: Magnetic Cable (with SMT Protect IC)
  
• Water Resistance Level: 5ATM
  
• Compatible Systems: Android 6.0 and above, iOS 11 and above
  
• Functions:
  
• Heart Rate Detection
  
• Blood Oxygen Test
  
• Couple Interaction
  
• Women's Cycle Tracking
  
• Multiple Sports Modes
  
• Sleep Tracking (Sleep Duration, Sleep Quality)
  
• Step Count
  
• Data Sync with APK/App