Active headphones with LED (built-in diodes in the cable) The diodes located in the cable pulse to the rhythm of the music you are listening to. Additionally, the built-in microphone allows for convenient call handling without the need to hold the phone or switch headphones. Specifications: -LED lights flashing to the rhythm of music -3.5 mm jack -cable length 100 cm -impedance 16Ohm +/-20% -frequency 20-20000Hz -10mm speaker -built-in microphone -USB charging cable included -button for answering/ending calls -colorful packaging