The Esinkin Bluetooth Audio Receiver Adapter in black is designed for music streaming with wireless Bluetooth connectivity. It features a 3.5mm jack port and is easy to install, making it ideal for audio receivers. With Bluetooth v4.0 standard, this adapter from Esinkin provides a convenient and reliable way to connect your devices and stream music without the hassle of wires. Made in China, this compact adapter with dimensions of 1.97 inches in length and width, and 4 inches in height, is a practical solution for enhancing your audio experience.