onnect two Bluetooth devices at the same time Speaker wire only for connecting the speakers together Built-in amplifier eliminates need for amplifier/receiver o kick it up a notch, the classic R1010BT Bluetooth speakers re-introduces bookshelf speakers in a whole new way. What you get is the high-quality audio performance you’d never expect from such simple a compact design. Housed in 100% medium-density fibreboard (MDF), this R1010BT is the revisitation of another Edifier classic, the R1000TCN. Featuring 4\' bass drivers and 3/4\' silk-diaphragm tweeter drivers, the R1010BT Bluetooth bookshelf speaker is engineered to deliver commanding sound with subtlety and details. 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. Sleek well-designed dome tweeters for smooth, articulate highs.Ceramic-paper cone drivers deliver powerful bass. TOTAL POWER OUTPUT： R/L: 12W+12W SIGNAL TO NOISE RATIO: ≥85dB(A) FREQUENCY RESPONSE:70Hz-20KHz INPUT SENSITIVITY:Line in A: 700mV±50mV Line in B: 500mV±50mV Bluetooth: 400mV±50mFFS INPUT TYPE: RCA (x2) BASS DRIVER: 4 inch (106mm) TREBLE DRIVER:Φ13 mm