Kikkerland US017 LED Flash Earphones Colored LED lights flash to the music Soft silicone earphones offer a super comfortable, noise reducing fit Great for smart phones, iPhones, iPods, MP3 players and other electronic devices 48-inch cord length Sound pressure level: 116dB / Frequency response: 18Hz-20kHz / Impedance: 32 ohms Colored LED lights flash to the music Soft silicone earphones provide a super comfortable, noise reducing fit Works with every iPod, mp3 player, CD, portable DVD, PSP, MD, and Laptop 3.5mm stereo connector 48-inch cord length