The Apple Watch Series 5 uses the same T8006 CPU as the Apple Watch Series 4, except it adds a built-in magnetometer
and it was rebranded as the "Apple S5".
It also contains a GPS module, and on cellular models an LTE chip.
Specifications
Display: LTPO OLED Retina display with Force Touch
Screen: Ion-X glass or Sapphire Crystal glass.
Compatibility: iOS 13 or later running on an iPhone 6s or newer