The product you describe is a Bluetooth compatible module auxiliary adapter designed for vehicles with 2RCA interfaces. This module allows you to wirelessly connect your phone, tablet, or other Bluetooth-enabled device to your car stereo via the 2RCA (auxiliary) input to play audio. Here is a detailed breakdown of the main features and specifications: Key Features: This Bluetooth adapter is designed for vehicles with 2RCA interfaces. It works well with cars that have a rear CD player or navigation system, such as those from brands like Clarion. High Quality and Performance: The module is designed with premium materials to ensure stable performance and high reliability, which means it should work seamlessly for a long time without major issues. Easy Operation: Installation is very simple: plug the adapter directly into the back of your car radio or stereo, connect the red cable to 12V+ (positive power) and the black cable to 12V- (negative power). Once installed, you can pair the module with your smartphone, tablet, or other Bluetooth-enabled device to play music through your car speakers. It supports Bluetooth 5.0, ensuring a stable and high-quality wireless connection. Technical Specifications: Name: Universal Wireless Bluetooth Audio Cable Module for Cars Material: Plastic shell, FORdurable and lightweight Bluetooth Version: Bluetooth 5.0, provides better range, stability and speed than older versions Product Voltage: 5-12V, compatible with most car electrical systems Wiring Power Supply: Connect the red cable to 12V+ (positive power supply) and the black cable to 12V- (negative power supply). Product Included: 1*Car Bluetooth Receiver Additional Notes: Color Variation: When viewing the pictures, the color of the product may vary slightly due to your monitor or lighting conditions. Size/Measurement Deviation: Due to manual measurement, the size may vary slightly (1-2 cm).