The SE535 utilizes a dedicated tweeter and dual woofers to deliver spacious sound with rich bass. The color models (Bronze and Red) come with two new connectivity options -- an included Bluetooth cable for wireless convenience and a universal communication cable (compatible with both Apple and Android). See moreWHAT'S IN THE BOX - Includes a free two-year warranty, SE535 Detachable Sound Isolating Earphones, 3.5mm cable, fit kit with a variety of sleeves for the perfect fit, 1/4“ adapter, and a carrying case. COMPACT CARRYING CASE - Convenient, tangle-free solution to store and travel with your earphones. DURABLE REINFORCED CABLE - Detachable cable is durable enough to withstand everyday wear, yet allows for easy replacement in case of damage. Gold plated MMCX Connector has a lock-snap mechanism allowing 360-degree rotation for comfortable fit. STRIKING FULL-RANGE SOUND - Full range sound from a triple high-definition driver to deliver accurate, natural sound in a discrete, durable design. SECURE, OVER-THE-EAR DESIGN - Wireform fit ensures earphones stay in place and cables remain out of the way. CUSTOMIZED FIT - Includes three sizes (S, M, L) of the flex and black foam sleeves. Experiment with the size and style that creates the best fit for you. Enjoy the most immersive listening experience with a design that keeps earphones in and noise out during exercise or travel. It’s the right way to listen and the only way to really hear. SOUND ISOLATING TECHNOLOGY - Own your audio space with sound isolating design that blocks up to 37 dB of noise to eliminate distractions.