The 135 grams light Nokia N9 has a 251 ppi 3.9 inch display based on AMOLED. It also has a 1450 mAh battery, which can be used much more efficient thanks to the OLED technology because only bright pixel need to be supplied with energy. On the back it has a camera with a maximum resolution of 8 megapixels.
In the Nokia N9 a Single-Core processor does the computing, assisted by 1 GB of RAM. For technology enthusiasts: To calculate the graphics a PowerVR SGX530 is used. To save images, videos, music etc. there are 64 GB of storage available.