Dairle M14EL Deep Bass Sound in-Ear Headphone Earphones with Microphone for Cell Phone, LED Flashing Lights (Green) Syncs with The Beats of Your Music 1.The Battery function (flash led light) maybe fail because it staying in Inventory for over 1 year without charging, that is why it is selling at $7 such cheap to instead of initial $20. but other key feature are still perfect such as music listen, remote Microphone control and phone talking. 2.Press for 3 seconds the center button and the lights will start performing 3.Please charge first before using the product. Please avoid folding the earphone line so the luminous function will not get effected 4.The EL light will sync with the beats of your music and the mesmerizing lights will make you the center of attention anywhere, anytime 5.Work with your iPhone , LG , Samsung , HTC , Sony , Nokia , Motorola, and many other smartphones which support 3.5mm plug!