... selectable, OEM service available. 2. Unique design. 3. High quality. 4,CE,FCC 2.1 Multimedia Speaker with USB Reader Functions: ... 1. Multi-media Speaker.2. Color selectable.3. OEM ... ,4onmIsolation:45dBAFrequency response: 100Hz-20KHzSensitivity: 500MV±50MVSNR:≥70dBDistortion:≤0.3%Applicable toLaptop,digital music player,PC,mobile phone, ...