[FDE] auto lock the computer based on proximity of the user

[Ivan Ezust]

This is a bit off-topic, but I think the readers of the list will have
some recommendations.

I was searching for a device that automatically locks a computer if
the authorized users steps away from the computer. I found one at:
http://www.dlock.com.tw/pc_lock_timer.htm

It seems decent, but I have never heard of the company before.

Has anyone used this product before? Do you know of any similar
products from a more reputable vendor?

Ivan