Inputs – RCA/AUX, Optical/Coaxial, Bluetooth for ConvenienceTreble/Bass Control, SUB-LINE OUT – Adjust bass, treble, volume and toggle inputs on panel.Wireless remote rear – Mobile phone compact remote control for input selection, volume adjustment and follow Bluetooth devices. New Technology FamilienceTreble/Low Back Control Old School Design with the latest technology. the R185 5DB is an active library 2.0 speaker system intended for you sound accurately the angle of 10 degrees to direct into the MDF deluxe wood enclosure suitable for minimizing acoustic response. Quality and performance sound subwoofer output products. The bass vibrates a room or space it holds, creating an ideal atmosphere for entertainment. The R1855DB is classic and fun with the latest Bluetooth technology, which will allow the playback of phones, tablets or laptops. When we think of R1850DB shelf speakers the first thing that comes to mind is balance; the perfect balance of function and design.Comprehensive ControlsThe R1855DB comes with a fully selected remote control for the set of shelf speakers. Adjust the volume, switch inputs, mute speakers and Bluetooth control connected playback with all your fingers. The design of the remote control with its modern elegant ambience puts power in your hands. It is easy to use and slips into the palm of your hand providing the ultimate comfort. Edifier, it's easy to do with the simple remote controls for the R1855DB's speakers. Entries are accessible with clear and concise features compliment the manual.