The highly-anticipated Samsung Galaxy S4 unveiling is just hours away, but leaks keep surfacing and now clearer images of the much-hyped flagship are available.

This time, Chinese tech site it168.com claims to have an engineering prototype of the Galaxy S4 handset. Engineering prototypes are typically very close to the final product, so these leaked images are likely not far off the mark. Images of the purported Samsung Galaxy S4 surfaced before, but none of them were as clear as these.

In terms of specs, the Chinese website's details fall in line with previous rumors and speculation: a 4.99-inch Full HD screen, a 13-megapixel camera, Samsung's eight-core Exynos Octa 5 processor clocked at 1.8GHz, 2GB of RAM, Android 4.2 Jelly Bean and 16GB of internal storage.

In an interesting twist, the it168.com prototype features dual-SIM and dual-standby (GSM and WCDMA) mode, which means it's likely that this is a China-only version of the handset.

On the other hand, one notable absence is the much-rumored eye-tracking feature, at least not how it was portrayed. According to the photo captions on the Chinese website, the handset can scroll up and down the text when it detects the user's gaze on a Web page, but only if the user tilts the device accordingly. The site says the feature does not work very well, but believes the final software version may fix the glitches.

Other features the Chinese website lists for the Samsung Galaxy S4 include Smart Pause, a feature that enables the handset to automatically pause a video when the user looks away. LG also announced this feature for its Optimus G Pro smartphone.

The Galaxy S4 will also reportedly include the Galaxy Note 2's Air View feature, where hovering over supported apps and menus with the S Pen pulls up a preview. The difference is that with the Galaxy S4, this feature will work with the user's finger instead of a stylus.

All in all, the next-generation Samsung Galaxy flagship smartphone seems to pack plenty of top-notch specs and features, and for good reason. As the Galaxy S3 successor, the new handset has some pretty big shoes to fill. Stay tuned for the official announcement.