FeaturesConnectivity: Bluetooth / RCA stereo / 3.5mm aux-in4\" Kevlar driver & 0.5\" silk tweeter Treble and bass controls on the speaker36W RMS total power outputActive 2.0 compact bookshelf speakersThe Thonet & Vander Vertrag Compact Active Bookshelf Wireless Bluetooth Speakers near field studio monitors deliver high-quality audio for your home or office.PRECISE AUDIO36W RMS total power output. Each speaker features a 4\" woofer made of lignin cane fibre, and a 0.5\" tweeter made entirely of polyethene micro sheets for precision and detail.YOUR MUSIC, YOUR WAYEnjoy total control over your listening experience. Make adjustments to the treble and bass using the controls on the speaker. STREAM WIRELESSLYThese active bookshelf speakers are equipped with Bluetooth, so you can stream audio from your TV, smartphone, tablet or laptop.GERMAN ENGINEERING & DESIGN - HDAATM: High-Density Acoustic AbsorberThonet & Vander speakers are made from a specially constructed high-density wooden fibre, developed to be more rigid and dense than MDF (which is typically used).  These properties prevent the acoustic enclosures from vibrating, or delivering sound through their walls, resulting in a more efficient performance when compared to other similar speakers whose design involves several materials such as plastic, wood and MDF.