The device is powered by a 2.3GHz Qualcomm Snapdragon 801 processor and 2GB RAM. The phone is available in 16GB and 32GB internal storage variants with a microSD card slot that supports cards of up to 128GB capacity. It runs Android 4.4.2 KitKat, the latest iteration of the mobile OS with HTC's Sense 6.0 UI on top.
Though plastic can be cheap, both money- and quality-wise, but it can also be lightweight and sturdy.