Audio quality: Enjoy High Quality Untethered Music from Custom Tuned 40mm Drivers and Passive Noise Cancellation plus Foamed Earcups. Don’t miss any musical note with clear treble, mids and decent bass. Can be used for taking calls, Music playing option: Bluetooth 4.2 with Advanced A2DP CSR Chipset and AUX IN Audio for both Wired and Wireless Music (up to 30 feet), Build quality and looks: Crafted aesthetically with dual tone colors and adjustable headband, Muffs G has premium housing with comfortable lining and in-folding design for easy portability, Playtime: Powerful rechargeable battery lets you enjoy up to 12 hours of playtime on a single recharge - from your morning exercise routine to evening leisure un-winding