Pump up the volume at your next promotional event with these custom earbuds! Made of PVC, custom design your own earbuds to fit your business needs. Virtually any shape can be molded. A 3.5mm plug is included. A fun freebie for trade shows, conventions, fundraising events and electronics-themed promotions, this product has a lifetime guarantee. Invest in these unique headphones for your next marketing campaign! This supplier is QCA certified.