Lenovo has released a new teaser revealing key design elements of the K4 Note, just days ahead of the official unveiling on 5 January.

Lenovo K4 Note's latest motion poster says the device will have a killer sound system, and shows the device will have two three-grille speakers on the front-panel — one each on top and the bottom to provide enhanced audio experience.

In the 15-second clip, we also get to see a close-up shot of the top speaker with the front camera placed below it.

And at the bottom, we see three capacitive buttons — Home, Recent and Back — above the speaker grille. There is no sign of physical button to house a finger-print sensor in the front-panel, suggesting the biometric sensor, which is confirmed in the Lenovo device, is most likely placed on the back side below the primary camera module.

It is interesting to note that the placement of front-camera module closer to the centre remind us of the recently launched Lenovo Vibe X3 Youth and A7010 in China, which have pretty much the same front-panel design.

Also read: Lenovo Vibe X3, X3 Youth series launched in China

New Lenovo K4 Note video teaser out; to boast killer sound system, also hints Motorola’s hand in designLenovo India via Twitter

For the uninitiated, the Vibe X3 series, which was unveiled in mid-November, is Lenovo's first smartphone to be developed by Motorola Mobility. Even A7010 is understood to be designed by the latter.

Lenovo acquired Motorola Mobility from Google in 2014, and just few months ago moved the company's whole mobile division to Motorola, owing to the decline in profits. It is widely reported that all future Lenovo mobile devices will, therefore, be designed by Motorola engineers.

Also read: Lenovo, Motorola best selling smartphone brands in 2015 in India: Flipkart

Now, going by the new K4 Note teaser, we believe there is Motorola's hand in the device's design.

We won't be surprised if the K4 Note comes with the Motorola trademark metal strip on the back, which is implemented in the Moto G (2015), X Play, X Style series. [Check-out the images HERE]

All Motorola phones launched in 2015 house an elongated oval-shaped metal strip featuring the camera and LED flash, whereas the recently released Vibe X3 series and A7010 devices ship with an additional finger-print sensor below the camera module.

So far, the company has confirmed that the K4 Note will come with 3GB RAM, metal frame, fingerprint sensor, NFC (Near Field Communication) and superior display technology.

Read more: Five key feature upgrades of K4 Note over predecessor K3 Note

With a few more days left for Lenovo K4 Note's unveiling, we expect the company to reveal new features. Watch this space for more updates.