The key health features like blood oxygen and ECG are on the top of the line Series 6, not the SE or Series 3.
Read more here:: Which Apple Watch to get: How the cheaper Series 3 and SE compare to the new Series 6
The key health features like blood oxygen and ECG are on the top of the line Series 6, not the SE or Series 3.
Read more here:: Which Apple Watch to get: How the cheaper Series 3 and SE compare to the new Series 6