use the antenna for a tp link, and the reception really better, antennas could keep some stability Elder angle have an approximately 90 ° and the other about 60 ° but it must lean on the wall, as it falls otherwise, but for the price they are top, Emfpang is at least twice as good,
but you should bear in mind that with 12dBi the transmit direction is really good only in the horizontal and the vertical very stuck decreases, so best to use more and align in different directions have now 2 off, and an omni-directional antenna, kalppt good