Microlab MD312 Compact Portable 2.1 Bluetooth Speaker System, Black Features: 2.1 speaker system for full range music production Wireless music with Bluetooth® technology Generous bass effects and clear treble Front panel controls for playback and Bluetooth® pairing functions Comes with alternative 3.5mm stereo connection to most media players and computer Rechargeable battery powered for portable use; carry it with you Technical Specifications: Amplifier: Total Power: 4 Watt RMS Power distribution: 1.25 Watt x 2 + 1.5 Watt Harmonic distortion: < 5% 1 W 1 kHz Frequency response: 40 Hz - 18 kHz Signal/Noise ratio: > 65 dB Separation: > 45 dB Speakers: Tweeter type: 2” x 2 Tweeter rated power: 2 Watt 4 Ohm Woofer type: 3” Woofer rated power: 5 Watt 2 Ohm Interfaces: Output: NIL Input: 3.5mm stereo jack, mini-USB charging port Wireless: Bluetooth 2.1 + EDR, and A2DP Power: Lithium battery BL5C