1. This is a left and right -in speakers specially designed for notebook computers, with fine sound quality2. 360 degree surround to meet diverse noise reduction needs3. Small size, volume, high-quality -in laptop speakers, wide application range4. Strong compatibility, suitable for laptops, can replace laptop speakers5. Durable and easy to install.Product name: -in speakers for laptopsType: laptop speakersPurpose: Amplification : suitable for Probook laptopsApplicable : suitable for Probook 4530S 4531S laptop internal speakersColour:blackMaterial:plasticPackage Contents:1 pair x laptop -in speakerOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.