Anodized Aluminum & Leather Carry Strap Immersive B&O True360 Sound Low Frequency Support for Deep Bass Integrated Qi-Compatible Charging Pad Up to 8 Hours of Battery Life 1 x 5.5" Woofer and 3 x 1.5" Tweeters 2 x 35W Class-D Amps (Woofer & Tweeter) 2 x 4" Passive Bass Radiators Pair with 2nd Speaker for Stereo Sound 3.5mm Input for Wired Device Playback