Motorola is also replacing the sensor module on the back. The much larger PPG sensor uses five LEDs and four large photodiodes to measure heart rate, and possibly blood oxygen saturation, as accurately as possible. A metal ring around the sensor module could function as an ECG, BIA, or EDA sensor, however, it has not yet been confirmed whether the smartwatch features any of these sensors.
What is certain is that the Motorola Moto Watch Ultra features both a GPS module and a built-in LTE modem. This allows the smartwatch to track the distance covered while running or cycling and receive notifications on the go, even without a smartphone. It is not yet known when or at what price the Moto Watch Ultra will be released. Details about the operating system are also still pending. It remains to be seen whether Motorola will stick with a simple RTOS-based system or use Google’s Wear OS.