Genuine Sennheiser Adidas CX 680 Sports - Offering you the best sound experience and sports performance. Sweat and water resistant: ideal for sports. Feature a unique moisture protection system - it protects the sound system from sweat and water, no matter how heavy you work out (and sweat) or how heavy the rain may be. High-output ear-canal drivers: energizing sound and high noise insulation. Acoustically closed - blocks outside noise effectively hence more recommended for indoor use. Short cable for ease of use while running or working out with your player around your neck or on your arm; option of using extension cable with volume control. Practical accessories like cable clip and storage pouch included in the delivery. Ideal for use with all MP3, iPod, CD players, mobile phones ( 3.5mm) and AV systems installed in gyms.