Microlab MD220 Portable Stereo Speaker, White: * Portable speaker for any tablet or smartphone with 3.5mm plug * Special alloy coated drivers * Rechargeable battery, energy-saving function * Portable sound bar for any tablet or smartphone with 3.5mm stereo input * Output power: 2W RMS * Power distribution: 2x 1W RMS * Harmonic distortion:75dB * Separation: >40dB * Tweeter driver type: 4x 1.5" * Tweeter rated power: 2x 2W, 4 ohm * Power: USB 5 v, or 3.7V lithium rechargeable battery * Output: nIL * Input: 3.5mm stereo * Color: white * Dimensions: 3.6" x 2.3" x 2.2" * Weight: 0.97 lbs