Specifications: Output: RMS 3 + 3W S/N ratio: 65dB isolated Rate: 45dB Impedance: 4Ω Power: USB 5V Speaker unit: 3 x 2W Features: Accompanying speaker for PC, MP3/MP4 and notebook Mellow and clear timbre Built-in active amplifier Pure and elegant sound quality with unsurpassed effect In compliance with acoustics and aesthetics rationale Flexible sound with distinct tone levels Small size design and easy to take Technical specifications: Output: 3 x 2W Frequencies range: 100Hz to 20kHz Impedance: 4Ω Power voltage: USB/DC 5V/1A SNR: >90dB Speaker unit: 52 x 2mm