Feature: Built-in computer speakers with small space occupation 3 sets of speakers Simple installation High-quality ABS material Specification: Speaker Output: 3 x 3W Frequency Response Range: 60Hz-15KHz Signal to Noise Ratio: 70db Channel: 2.1 Power Interface: Large 2-pin male Audio Transmission Interface: 9-Pin female Form factor : 5.25 inch optical drive front panel Package Content : 1 x Speaker 4 x Screw