The phone has a dual sim card (WCDMA+GSM) and is powered by Intel Atom Z2580 running at 2GHz. It has 1GB RAM, 8GB ROM and runs on Android 4.3 JellyBean. Some interesting features include pencil as a stylus, HDR, high speed consecutive camera etc.
Below is a detail video showing the various interfaces of the ASUS ZenFone 5. Here is the video in Mandarin.