This is a 2.4G 4db high gain Bluetooth/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 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 antenna, in your other projects where you can also use it.

And we will add a ipex socket  for your welding work.