Asus 2nd-gen smartwatch is smaller than the original ZenWatch, and adds a side button, improved dust and water resistance, magnetic charger cable, improved charging time and new software. There are two models - one with a 1.63" 320x320 display and one with a 1.45" display (both AMOLEDs).

Asus ZenWatch 2 photo

The ZenWatch 2 is now shipping, the 1.45" model costs $149 while the larger 1.63" costs $199.

OLED type: 

1.63" 320x320 AMOLED

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters