![More sources confirm sleep tracking and blood oxygen sensor support in new Apple Watch - GSMArena.com news More sources confirm sleep tracking and blood oxygen sensor support in new Apple Watch - GSMArena.com news](https://fdn.gsmarena.com/imgroot/news/20/03/apple-watch-sleep-tracking-blood-oxygen/-728x314/gsmarena_000.jpg)
More sources confirm sleep tracking and blood oxygen sensor support in new Apple Watch - GSMArena.com news
![Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news](https://fdn.gsmarena.com/imgroot/news/18/09/apple-watch-series-4-announced/-728/gsmarena_001.jpg)
Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news
![Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news](https://fdn.gsmarena.com/imgroot/news/18/09/apple-watch-series-4-announced/-315/gsmarena_004.jpg)
Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news
![Oppo Watch 4 Pro unveiled with ECG and stainless steel body, affordable Watch SE tags along - GSMArena.com news Oppo Watch 4 Pro unveiled with ECG and stainless steel body, affordable Watch SE tags along - GSMArena.com news](https://fdn.gsmarena.com/imgroot/news/23/08/oppo-watch-4-pro-watch-se-announcement/popup/-1080x1080m/gsmarena_010.jpg)
Oppo Watch 4 Pro unveiled with ECG and stainless steel body, affordable Watch SE tags along - GSMArena.com news
![Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news](https://fdn.gsmarena.com/imgroot/news/18/09/apple-watch-series-4-announced/-315/gsmarena_002.jpg)
Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news
![Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news Apple Watch Series 4 arrives with larger display, ceramic and sapphire back, ECG - GSMArena.com news](https://fdn.gsmarena.com/imgroot/news/18/09/apple-watch-series-4-announced/-315/gsmarena_005.jpg)