The Vivo Watch is a smartwatch that features a round AMOLED display, 1.19" 390x390 or 1.39" 454x454. Other features include a blood oxygen monitor, heart rate sensor and 2GB of internal storage.

Vivo Watch photo

The Vivo Watch costs $190 (for both sizes) and will ship soon in China.

OLED type: 

1.19" 390x390, 1.39" 454x454 AMOLED