Connect two Bluetooth devices at the same time Speaker wire only for connecting the speakers together Built-in amplifier eliminates the need for amplifier/receiver Buy Edifier 2.0 Lifestyle Bookshelf Bluetooth Studio Speakers Overview Dual integrated line-in jacks for connection to other analogue audio devices, saving you the trouble of plugging in and pulling out. The tone control encompasses bass and volume together with the dynamic treble enhancement on port A which is dedicated to catering to your playback preference. For a personalised listening experience, you’ll find the bass and volume adjustment dials at the back of this bookshelf speaker. The R1010BT Bluetooth bookshelf speakers also feature dual stereo line-in ports. Most of all, it is Bluetooth ready. If you decide not to proceed, a full refund will be provided.