Microlab MD220 iPhone/Tablets Stereo Dock Speaker System, Black Features: Quality stereo speaker system with built-in amplifier Ideal for movies, gaming, music and PC applications Clear and uncoloured sound Mini soundbar type design Connects to any 3.5mm stereo jack easily e.g., tablet, PC, notebook, Mp3/Mp4, CD/DVD player, etc. Rechargeable battery with easy replacement Two power modes: USB or Lithium battery powered Comes with attached 3.5 mm stereo plug and cable. Easy and quick to stow in its recessed back panel. Technical Specifications: Amplifier: Output power: 2 Watt RMS Power distribution: 1 Watt x 2 RMS Harmonic distortion: < 0.5% 1 W 1 kHz Frequency response: 150 Hz - 20 kHz Signal/Noise ratio: > 75 dB Separation: > 40 dB Speakers: Driver type: 1.5" x 2 Driver rated power: 2 Watt x 2, 4 ohm Interfaces: Output: NIL Input: 3.5mm stereo Power: USB 5 V, or 3.7 V lithium rechargeable battery