Feature: 1. 360° stereo surround sound effect enhances the sense of hierarchy, allowing the sound to be displayed in all directions. 2. Activate the unused speakers, the high and low sounds are obvious, and your musical experience will be improved. 3. Made of high-quality materials, the data transmission is more stable, and the sound quality is no consumption. 4. Easy to install and use, plug and play, and it will not damage your car. 5. It is compatible with Tesla Model 3 2021. Specification: Features: 360° stereo surround sound effect enhances the sense of hierarchy, allowing the sound to be displayed in all directions. Activate the unused speakers, the high and low sounds are obvious, and your musical experience will be improved. Made of high-quality materials, the data transmission is more stable, and the sound quality is no consumption. Easy to install and use, plug and play, and it will not damage your car. It is compatible with Tesla Model 3 2021 . Specifications: Model: 8 Upgrade to 12(2018-2020)/ 8 Upgrade to 14(2021)(optional) Color: Black Material: Copper Wire Item Weight: 2018-2020: 120g/ 4.2oz 2021: 190g/ 6.7oz Package Size: 200 * 138 * 37mm/ 7.9 * 5.4 * 1.5in Package Weight: 2018-2020: 190g/ 6.7oz 2021: 280g/ 9.9oz Packing List: 1 * Speaker Activation Wire Package List: 1 * Speaker Activation Wire