The computer works great, but trying to use it using the built in wifi is a challenge without the small external antenna that screws onto the back of the unit.  You'll have to go somewhere else to buy the antenna.  I know that Lenovo ships them new with the antennas.I mentioned this to the seller, JSComputers and they said that if I wanted to use it via wifi, I would have to go buy one.I buy these and set them up for my customers.  This is the first I've bought from them and it will be the last.