By wireless router, do you mean access point? There are 3 different wireless access points. 802.11a, 11b, 11g. The most popular one is the 11b but max out at 11mbps. The 11b is avalible in USB, buscard(PCMCIA), compact flash, PCI, and mini PCI. It operates at 2.4Ghz. In reality, it maxs out at around 3 to 4mbps. 11a and 11g max out at 54mbps. 11a operates at 5.4ghz and 11g at 2.4ghz. The only 11g and 11a receivers that Ive seen are the PCI for desktops and buscard for laptops. The signal should go through wooden walls with ease. Concrete walls might cut the singal by a bit.