CamFi 3 is a wireless remote controller for DSLR cameras. It is a Wi-Fi transmitter, and as such, it will NOT need your mobile broadband.You can connect a CamFi 3 device to a DSLR camera with a USB cable, then use your mobile phone to connect to the CamFi 3 device over the Wi-Fi to remotely control the DSLR camera, which allows you to view, focus and shoot photos. It supports 802.11ac Wi-Fi technology, and has a high transmission speed and wide signal coverage. The Wi-Fi signal can be up to 50 meters in a barrier-free environment.