Size: 8*4*2cm / 3.12"*1.56"*0.78" Color: as shown in the picture Five selling points of MP3 5.3: 1. Multi-functional device: Car BT MP3 5.3 can be used as a car BT music player and a car radio reader, as well as supporting audio playback, e-book reading, and movie watching, meeting the different needs of users. 2. High-quality sound: Car BT MP3 5.3 uses a high-quality decoder and a built-in high-fidelity audio chip, providing a clear and realistic audio experience, letting you enjoy the passion of music. 3. Lightweight and portable: Car BT MP3 5.3 is small and lightweight, weighing only 30 grams, easy to carry, does not take up space in the car, and does not bring unnecessary burden to you while enjoying music on the journey. 4. Free combination: Car BT MP3 5.3 has a built-in 4GB storage space and supports Micro SD card expansion, meeting the storage needs of different users. It can be combined with any storage method for playback as desired. 5. Comprehensive compatibility: Car BT MP3 5.3 is compatible with various audio formats, including mp3, wma, flac, ape, etc. It also supports multi-language text reading, providing comprehensiveness and convenience. Package includes: 1 pc + instruction manual.