Active bookshelf speaker system with 24W RMS power output Bluetooth V4. 0 Pairs with two Bluetooth devices simultaneously Built in 100% MDF wooden enclosures 4 inch bass driver and 13mm diaphragm tweeter driver Dual stereo LINE-IN ports, Treble upgrade Edifier R1010BT 2. 0 Book Shelf Speaker Housed in complete medium-density berboard (MDF), this R1010BT Bookshelf Speaker is the great accessory to add to your drawing room. Featuring 4" bass drivers and 3/4" silk-diaphragm tweeter drivers, R1010BT bookshelf speaker is engineered to give commanding sound with subtlety and details. Salient Features Bluetooth Connectivity This Bookshelf Speaker system from Edifier comes with the most advanced Bluetooth connectivity feature, Bluetooth V4. 0. You can simultaneously connect two Bluetooth-enabled devices to transfer files and listen to your favorite music. Dual Stero R1010BT Book Shelf Speaker features dual stereo line-in ports, with dynamic treble enhancement on port A. 4-inches Bass R1010BT comes with 4 inches bass driver and F13mm diaphragm tweeter driver. This powerful bass would provide crystal clear audio turning your home into a theater.