https://www.audiolab.com/periodic-audio-giveaway?
Prizes: The approximate retail value of all prizes is $2388. The prizes are: 3 pairs of Periodic Audio Mg (Magnesium) In-Ear Headphones with Magnesium Alloy Diaphragm, 3 pairs of Periodic Audio Ti (Titanium) In-Ear Headphones with Pure Titanium Foil Diaphragm and 3 pairs of Periodic Audio Be (Beryllium) In-Ear Headphones with Berylliumfoil Diaphragm.