Microsoft 2nd-generation smart band (or fitness tracker) features a curved flexible OLED display, a GPS, a heart rate monitor, accelerometer, gyrometer, sleep and calorie tracking, ambient light sensor, skin temperature sensor, UV sensor, capacitive sensor, barometer and Cortana integration.

Microsoft Band 2 photo

The Band 2 will ship on October 30th for $249.

OLED type: 

Curved flexible OLED

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters