BULA presents the STEREOHEAD earphone and hat combos. There are three models available, the Sound Master, the Power Up and the Intro. They have different styles of hats such as beanie, lex cap, and Peruvian.
The Sound Master has a max input of 150MW, 20Hz frequency response, 32ohm and 40mm driver diameter. The Power Up and the Intro both accpet max input of 100MW. The Intro has a 30mm driver.