Easy to use: Simply connect the speaker with the device to instantly turn speakers into a Bluetooth wireless speaker. Wireless Play: Enjoy high-fidelity music anywhere indoors with wireless connection and control, eliminating the hassle of wired setups. Designed with a standard USB port for reliable connectivity. LED status indicators and low power consumption. Compact and portable design for easy carrying. Applications: Suitable for car stereo systems, home audio systems, and more. The Bluetooth receiver is designed to upgrade traditional car stereos and home audio systems, enabling Bluetooth connectivity with smartphones, laptops, tablets, and other Bluetooth-enabled devices. Operations: For USB speakers without power supply: Connect the charger with a 5V USB interface, then connect the receiver to the speakers AUX port using the included 3.5mm audio cable. For speakers with a USB port: Connect the device directly to the speakers USB port, then connect the receiver to the AUX port using the included audio cable. Specifications: Color: White Bluetooth version: 2.1+ Supports A2DP V1.2 Powered via USB port (5V DC) Transmission speed: 3 Mbps Transmission range: Up to 10 meters Power source: USB-powered Item dimensions: 5.5 x 2.0 x 1.0 cm Item weight: 8 g Package includes: 1 x USB Bluetooth audio receiver 1 x 3.5mm audio cable Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement tolerance: +/-1-3 cm.