It is a Rubber Duct GSM External Antenna with 5 cm or 2-inch height. The antenna is very compact in size and is attachable directly to the SMA connector. The gain of the antenna is 2 dbi.
This GSM External Antenna does not include any wire, making the design sturdy, and trouble-free. It is applicable to frequencies: 800-900/1800-1900. It can also be used with 2G or 3G devices, i.e. GSM, CDMA, WCDMA, EVDO, TD.