The Beats by Dr. Dre Solo 4 Wireless Bluetooth On-Ear Headphones in Slate Blue are a top-of-the-line choice for music enthusiasts seeking high-quality sound and convenience. With a 40mm driver size and a frequency range of 20HZ-20KHZ, these headphones provide clear and immersive listening experiences. The foldable design, adjustable headband, and built-in microphone make them perfect for on-the-go use, while the Bluetooth connectivity ensures freedom of movement. Ideal for studio monitoring, DJing, and live monitoring, these headphones come with a 1-year manufacturer warranty, making them a reliable choice for professionals and casual listeners alike. Beats by Dr Dre Solo 4 Wireless Bluetooth On-Ear Headphones MUW43LL/A Slate Blue - UD - One Cable Only. FOAM HAS PEELING AND WEAR/CABLE COVER HAS COME OFF, SEE PHOTOS FOR WEAR.