Brand: QVS. MPN: CC399C-06. Connects smartphone tablet or any device with 3.5mm audio port to headphone with 2.5mm port or vice versa. Connects smartphone tablet or any device with 3.5mm audio port to headphone with 2.5mm port or vice versa. Slim audio connector fit headphones including Bose QC35 JBL S700 and others with 2.5mm port. Available Lengths: 6ft & 12ft. Sold as 1 Each.