Connectivity is taken care of with 4G, WiFi, WiFi Direct, Bluetooth 4.0 and GPS. The phones come with Android 5.0 and run a new version of the Asus ZenUI that Asus claims has over 1000 enhancements. For camera enthusiasts, the Zenfone 2 has a 13MP camera with f2.0 aperture and a dual tone LED flash. It uses Asus's proprietary pixelmaster 2.0 technology that automatically adjusts the maximum contrast ratio of the image for improved photographs in any scenario. The front 5MP camera also has a f2.0 aperture with 85 degree wide angle lens. Improving upon the design, the Zenfone 2 is the similar size as a smartphone with 5-inch display. It has an arc design for comfortable hold, brushed metal finish on the rear panel, and continues with the concentric circle pattern on the front. Volume buttons are now placed on the rear center making the phone easy to use for right as well as left hand users.