Boombox Stereo Necklace 80s Retro Hip Hop NI07 Music DJ Charm Pendant Crystal Fashion Jewelry Ships from the USA Boombox Stereo and Headphones Necklace. A perfect gift for an aspiring DJ or music lover. Boombox Pendant Size: 1.5 . Headphones Size: 0.5 inches. Chain Length, Open From Clasp to End: 28 inches. Makes a perfect gift. Search Magic Metal Jewelry for more jewelry styles.