OLED displays have several advantages: low power consumption, bright, large viewing angle for better readability and high resolution.
Specifications:

1. resolution: 128 x 64 dots
2. viewing angle: > 160°
3. working voltage: 3 - 5 V
4. recommended library: U8glib
5. interface: I2C
6. driver: SSD1306
7. working temperature: -30°C - 70°C
8. OLED colour: blue
9. I/O level : 3.3 V and 5 V
10. dimensions: 27 x 27 mm

vma437_u8glib.zip

vma438_datasheet.zip

wpi438a4v01.pdf

ce_rohs_open.pdf