I have the same one as the D-Link.
But mine is from level-one (but looks exactly the same and they are known to be same interior)
I am very happy with the device, it supports WLAN client, Access-Point and Router. It also supports PPPOE and other login types.
On the wireless it supports wep 64, 128, wpa-psk, 11b and 11g.
max address filter and ssid hide.
So anything you would expect from a big guy :-)
It comes with two powersources, one for 110-220 volt and one usb power cable.
see here:
http://www.level1.com/products3.php?sklop=8&id=540514
about the range. It seems to be not as good as routers with external antennas, but I did not expect it to be.
But I am quite impressed of the range of it anyhow.
Its major power is the flexibility.
I use it quite often to bring my notebook into a network while I am on a trip. The routing function is nice to connect 2-x notebooks pretty fast.
Dont trust the manual in all terms, it says that the ethernet is not autosensing, but it is :-)
So I am really satisfied and paid about 68 euros for it. (special bargain price)
Greets Thorsten