One of the coolest features of the Carta is its app which you can use to adjust temperature within a single degree. To connect your Carta Smart Rig to the app, you need to make sure your rig is powered on, then open the app on your phone. Don’t have the app? You can download the Focus V Carta App here. When you open the app, you’ll be greeted by a prompt asking you to connect. Choose your Carta Smart Rig from the dropdown list that populates with all of the Bluetooth-enabled devices in the vicinity.