IBLINK BLB2 Earbuds with LED Lights (Black with Blue LED Lights) Patented Led Lighting Technology With Bass Boost & Noise Isolations Lights Flash To The Sound Output Of Any Device With A 3.5Mm Headphone Jack Volume Level Of Music Device Controls The Brightness Of The Flashing Lights Light Can Be Turned On Or Off While User Is Listening To Music Patented LED lighting technology with bass boost and noise isolations Lights flash to the sound output of any device with a 3.5mm headphone jack Volume level of music device controls the brightness of the flashing lights Light can be turned on or off while user is listening to music Cord length: 44-Inch