1、COMPATIBLE MODEL: This delicate laptop built in speaker replacement is designed for ACER 5750G 5750Z 5755G 5350 V3 571 V3 571G V3 551G E1 571 E1 521 laptop. 2、PERFECT REPLACEMENT: Precise cutouts that fit perfectly on the part of your laptop that needs to be replaced, perfect replacement for the damaged part of your laptop. 3、COMPACT AND PORTABLE: The built in speakers are compact and don't take up too much space for use and won't add burden to your computer. Replace broken, damaged, cracked, and inoperable speakers with 2 speakers, you can use with confidence. 4、DURABLE DESIGN: The built in speaker is made of ABS material, sturdy and durable, not easy to be damaged, can be used for a long time. Replacement internal speaker set for laptops, tested before shipment. 5、PROFESSIONAL INSTALLATION: Please replace them under the guidance of professional technicians to avoid unnecessary losses. Internal speaker replacement with connector, plug and play, simple installation, won't take you much time.