The product is a replacement left earbud for a Bose QuietComfort earbud set in black. It is designed for in-ear use with Bluetooth wireless technology. The earbud features active noise cancellation, replaceable ear tips, water resistance, playback controls, a rechargeable battery, noise cancellation and isolation, wireless charging, built-in microphone, and touch controls. It is suitable for studio monitoring, DJ, and live monitoring. Not working, takes a charge, blinking white light constantly. For parts or repair