DURAGADGET High Grade Polymer USB Powered Laptop Speakers For HP Pavilion 15-n014nr 15.6-Inch Laptop (Silver and Black) HP Envy 6 Sleekbook High grade speakers produce rich and quality sound with excellent bass, middle and treble ranges (frequency range 20 Hz -20 kHz) 7 cm pressure drivers give you more bass response with less distortion Works through one USB cable for added convenience - does not require mains supply Handy buttons on speakers to change volume and mute sound Made from high grade polymer for extra durability and longevity