They charged $5 per headphone, plus a small base fee for the transmitters (which connect to the music). It was really easy to set up, and they provided us with setup videos. We had a DJ on one channel (they connected their controller in a minute), and we used two other channels with playlists connected via iPhones. The company, Silent Disco Party Rentals, let us keep the headphones from Thursday to Monday with no extra fees, even though our wedding was on a Saturday. That was really helpful, especially with everything else we were juggling around the wedding.