Excellent, we used our own earphones linked to our own mobile phones. Links were sent from GYG which was linked to an app called Vax city which you had to download which recognised your purchase. Once inside we easily accessed the audio which guided us around the basilica with a map. The audio was very interesting and gave lots of information which we would have otherwise not known about. Entrance to the Basilica is free so the queues can be very large, we went very early morning which was quiet and peaceful so definitely recommended. We went on a Sunday so Services were on, there was a baptism and a married couple came in to pray, it really is a busy magnificent place. We sat outside afterwards not realising that the Pope was due to give mass outside in the square - wow that was incredible.

A very helpfull device to explore the cathedral on you own. It points to details which would be difficualt to discover on your own. Though itz has to be said too, the thxt contains a lot of spiritual statements which might not conform to all peopels opinion, even though if you are catholic. But the guide has a fast feed forward function.

Particularly impressive place both by its dimensions and by the richness of the interior decoration. A bit of a pity all the same that everything was built thanks to the systematic looting of ancient monuments. A lot of people necessarily, but the audio guide is very practical because it allows you to visit at your own pace.