The SP Connect Universal Interface SPC+ can be attached to your existing phone case to be compatible with the SPC+ mounts, either mechanically or magnetically, depending on the model. Or use it to mount other gadgets like tablets, speakers and power-banks mechanically. It's very easy to mount the Universal Interface to your phone case. Remove the protective film from the adhesive pad and press it onto the back of your case. Make sure to centre it as much as possible for best results.