Strong and Robust Bass Reproduction BT30 employs a bass reflex port that has a straight shape and adequate length to provide an outstanding bass response, together with the 4-inch driver to output a strong and robust bass reproduction. Bluetooth Connection Simply pair these active bookshelf speakers with your smartphone, PC, or tablet and stream your music library, internet radio, Spotify, Tidal, etc and enjoy your music wirelessly Optical, Coaxial and Analog Inputs Optical and coaxial inputs to connect your TV, Game Consoles, DVD/CD, or Blue-Ray player to enjoy the lossless and astonishing sound quality. Dual RCA inputs for Turntable or any Hi-Fi source connection. We have included all connecting cables for your convenience. Sleek and Contemporary; in line with the style of modern home life Looks simple yet contemporary design. The appearance is clean and plain while it combines elegance, in line with the style of modern, minimalist home life. Built in DSP and DRC Prosonic BT30 series have built-in Digital Signal Processing(DSP) and Dynamic Range Control (DRC) chips to handle mid-bass and treble independently, allow to reproduce bright and layered sound with no distortion in bass boost so that you will enjoy every detail. Graceful lines of design High-quality MDF wood speaker cabinet with a matte coasting front surface. Rounded corners and softly curved front panel minimize edge reflections in the speaker cabinet. It comes out with smooth and accurate stereo playback. SPECIFICATIONS 40W x 2 RMS Audio output Power 0.75" Silk dome Tweeter4" Full range driver4 Ohm Nominal impedance84dB signal to noise ratio distortion < / = 4%Frequency Response: 55Hz - 20KHzClass D amplifierINPUTS: RCA Line-in x 2, Optical x 1, Coaxial x 1 and Bluetooth100V-240V Power supply PACKAGE CONTENT A set of Bookshelf SpeakerUser ManualRCA male to RCA male Aux-in Cable x 13.5mm male to RCA male Aux-in Cable x 1Optical Cable x 1Coaxial Cable x 1Speaker Cable x 1 ( 8' long)Power Adapter x 1 ( 100-240V, 1.2A)IR Remote Control