Smart Ring with Display, Health Tracker, Bluetooth, Size 12

Smart Ring Health Tracker with LED Display Screen, Activity Tracker/Heart Rate/SpO2/Sleep/Step, Bluetooth Connection, IP68 Waterproof Smart Ring for Iphone & Android (Silver # 12). Weight: 3.4 g. Chip: Dialog Da 14585 BLE Storage Capacity: 128 kb ROM + 96 kb RAM Batery Type: Polymer Charging method: Magnetic charging. Compatibility: Android 5.0 and above, Apple IOS 10.0 or later Compatible Software: JRing I have 3 available. Reasonable offers and trades are welcome. I am currently seeking a printer works with toner cartridges.