Top Dawg TDPRIME2 Prime Hi-fi Over the Head Stereo Headset Exclusive noise canceling with 4 times noise cancelation Stereo Bluetooth4.0 Headset with Hi-Fi sound quality, incredible bass response with a wide range of frequencies Professional quality sound with advanced noise cancellation technology: Ideal for use in loud and noisy environments Up to 50 hours of talk/listen time and 1,200 hours of standby time Serves as both Bluetooth phone headset for hands free calling and wireless stereo music/movie/game playing headphones