The iworld Bluetooth Audio Car Adapter allows for hands-free calling and connection to a home stereo system with a 3.5mm jack. With its integrated mic and rechargeable battery, this Bluetooth v4.1 adapter provides wireless connectivity for audio receivers and car auxiliary systems. The sleek black design and compact size make it a convenient and portable solution for streaming music and taking calls on-the-go. Made in China, this model (WBTCK) ensures a seamless Bluetooth experience for a variety of devices.