Xiaomi's Watch S4 Sport smartwatch offers a 1.43" 2200 nits 466x466 AMOLED display, the company's own HyperOS and heart rate, SpO2 and depth gauge sensors. The Watch S4 Sport is now shipping in China for around $275. OLED type: 1.43" 2200 nits 466x466 AMOLED Tags: OLED devices Wearable devices with OLED displays Posted: Jul 20,2024 by Ron Mertens