This compact 2.4GHz omnidirectional "rubber-duck" WiFi antenna provides broad coverage and 7dBi gain. It is a coaxial sleeve design with an omni-directional pattern. It is ideally suited for IEEE 802.11b and 802.11g wireless LANs,
This flexible antenna features a tilt-and-swivel reverse-polarity SMA connector, allowing them to be used vertically, at a right angle, or any angle in-between. It is suitable as a replacement RF antenna for many access points and radios that are equipped with reverse-polarity SMA connector including D-LinkR, LinksysR WET11 and others.

Specification:

7dBi gains
Frequency range 2.4Ghz
VSWR <=1.5
Impedance 50 Ohm
Polarization Linear Vertical
Light Weight
Omnidirectional Antenna
Polarization Vertical
length: 30cm
Cable Type, RG174
Cable length,2m
Cable terminal, RP SMA (SMA Plug, socket pin)
Optional Connector, SMA/SMB/MMCX/MCX/FME/BNC/TNC
Magnetic Mount - Put the antenna near the window or on top of a vehicle where it can pick up more signals