With these Blinx Sound Responsive LED Earphones blazing away you’ll leave no doubt that you’re rocking out to hardcore tunes. Each earphone has three LEDs that pulse with the music and are driven by the inline LED equipped control box. They work with any music device equipped with a 3.5mm socket. £24.95, but I’m not sure if the batteries are replaceable.
Blinx headphones work with any device with a standard 3.5mm headphone jack. When the earphones are switched on and plugged into any sound source (MP3, CD Player or Cassette Player) the LED’s flash in time to the music, giving a fantastic light show when viewed in low light.