You're looking at what Chinese phone maker Oppo claims to be the slimmest smartphone in the world—which measures just 4.85mm front to back. That's too slim to fit in a headphone jack, for God's sake.
The R5 is the successor to the Asia-only R3. It's 0.3 mm slimmer than the already crazy-thin Gionee Elife S5.1, and its all-metal body weighs in at 155g. It's worth stopping to think about just how thin 4.85mm is: less than 1.5 times the diameter of your headphone jack (which is, presumably, why the phone doesn't have one).
Amazingly, it actually contains some none-too-shabby guts. You're looking at a 5.2-inch full HD AMOLED screen, a 64-bit Snapdragon 615 SoC, 2GB of RAM, both 5MP and 13MP cameras, LTE radio and a 2,000 mAh battery. There's 16GB of internal storage, but no microSD expansion.
It's not all positive, though. That lack of3.5mm headphone connector means you'll have to use a bundled micro-USB adapter or Bluetooth. And the phone runs Color OS 2.0—an OS based on Android 4.4—which is OK, but, well... not what we'd go for through choice.
The R5 is due to hit the global market this December. It'll come in silver, gold and grey with an off-contract price of $500. [Oppo]