Lenovo Portable Speakers MO520
-Output Power: 1W+1W
-Frequency Response: 90Hz~20KHz
-Speaker Unit: 2 4 3W
-Rating: USB 5V 500mA 2.0 speaker system design Two speakers (satellites) with one watt per speaker (each satellite); two watts of total output
-Primary speaker: USB and audio cable
-Secondary speaker: Audio cable attaches to the primary speaker 90Hz to 20 KHz frequency response.