Edifier R1850DB Active Bookshelf Speakers with Bluetooth and Optical Input - 2.0 Studio Monitor Speaker - Built-in Amplifier with Subwoofer Line Out The R1850DB is a dynamic 2.0 active bookshelf speaker housed within a MDF frame. The woofers on this model produce a quality sound and swift execution. The bass of this model vibrates any room or space it occupies. The additional subwoofer output allows you to add a subwoofer to transform this model from a 2.0 system to a 2.1 system. The R1850DB is exemplary and fun with the most recent Bluetooth innovation permitting recess from smartphones, tablets or PCs. R1850 black speakers music audio sound remote bass bluetooth Woofers, Tweeters, and Grills The R1850DB comes with grills that gives you the choice of placing a grill or taking them off so you can see the beautiful tweeters and mid-range drivers. Tweeters:Φ19mm silk dome, 6ohm Bass/Mid-Range:: 4-inch Φ116-mm 6ohm Sleek Piano Finish We understand that asthetics is also important in an audio setup. The R1850DB active bookshelf speakers feature a piano black finish that look beautiful. Accessories Included Wireless Remote Connection Cable: 5m/16-feet RCA to AUX Cable: 1.7m/5.6-feet RCA to RCA Cable: 1.7m/5.6-feet Optical Cable: 1.5m/4.9-feet Input Connections RCA RCA to AUX Optical Coaxial Subwoofer output Remote Control Mute Power Volume up/down Input Select: PC, AUX, Optical, Coaxial, Bluetooth Bluetooth Controls: Pause/Play/Skip Track