Teenage Engineering OB–4 Portable Bluetooth Wireless Stereo Speaker with fm-Radio and Long-Lasting, Rechargeable 72 Hour Battery Life

high quality audio – listen to crystal clear sound through two 4'' bass drivers and a pair of neodymium tweeters, a flow-optimised bass reflex duct delivers deep natural bass. all together you get 38 watts per channel — that's around 100 decibels of incredible sounding stereo that fills the entire room.