Product Name: Bluetooth Audio Receiver and Transmitter 2-in-1 Material: ABS Size: 6*2.2*1.2cm / 2.34"*0.86"*0.47" Color: Black 1. Convenient and easy to use: The Bluetooth audio adapter can be connected to a variety of devices, including smartphones, tablets, computers, and speakers. It easily enables wireless music transmission, freeing your hands and ears. 2. High-quality sound: The Bluetooth audio adapter is equipped with a high-end chip, which provides high-quality sound, bringing you a lossless music experience and allowing you to enjoy the original music sensation. 3. Long-duration use: The built-in large-capacity battery can be used for multiple hours, allowing you to enjoy a long-lasting wireless music journey. 4. Compact and portable: The Bluetooth audio adapter is small in size and easy to put in your pocket or carry with you, making it convenient to use anytime. 5. Versatile Application: This adapter can upgrade traditional audio equipment, such as old speakers and car audio devices, to Bluetooth-enabled devices, offering more usage experiences. It is also compatible with various brand and model devices, improving device compatibility and interoperability. Note: 1. As we all know, different computers display colors differently, the color of the actual item may vary slightly from the following pictures. 2. Please allow 1-2 cm measurement deviation due to manual measurement. Package includes: Host, Charging Cable, 3.5mm Audio Head, User Manual.