What does the AWD Lock button do on the Kia Sorento?

I'm a bit confused about the AWD Lock button on my Kia Sorento. Does it lock all four wheels or just the front ones? How does it work and when should I use it?

The AWD Lock button locks all four wheels, providing equal power to each wheel and giving you better traction in slippery conditions. You can use it when you're stuck in mud or snow, or when you need extra support on steep inclines.

It's important to note that using the AWD Lock button for extended periods of time can cause damage to your drivetrain. It's best to only use it when necessary and turn it off afterwards.

I found that using the AWD Lock button while driving on paved roads can actually decrease your fuel efficiency. It's best to only use it in off-road situations or when the roads are particularly slick.