This is a 2.4G 4db high gain Bluetooth-compatible/Wifi antenna, It has a very high sensitivity which is using the material of radiator PCB, It can work with our SIM808 shield cause that we upgrade the firmware and increase of bluetooth-compatible function. If you are using our old version of sim808 shield, and you want to upgrade it by yourself, you may need this antenna. Of course, as a high-quality 2.4G Bluetooth-compatible antenna, in your other projects where you can also use it.
And we will add a ipex socket for your welding work.