Kikkerland US033 Bolt Earbuds - Retail Packaging - Yellow/Black by Kikkerland. $8.00. Listen to your music in style with these fun lightning bolt ear buds. Soft silicone ear buds provide a super comfortable, noice reducing fit. Great for smart phones, iPhones, iPods, MP3 players and other electronic devices. Designed by Jan Habra ken. 3.5 mm stereo connector. 20Hz - 20kHz frequency response.