The Yesido YAU40 is a multifunctional USB Bluetooth transmitter designed to bring wireless audio to your car or home audio systems. With Bluetooth 5.0 technology, it offers stable transmission and supports connection to two devices simultaneously. This adapter not only converts Bluetooth signals to a 3.5mm AUX connection but also includes TF card playback and a built-in mic for hands-free calls. Its compact design and remote control functionality make it a versatile audio solution. Specifications: Brand: Yesido Model: YAU40 Bluetooth to 3.5mm AUX Adapter Color: Black Applicable to: Smartphones, Speakers, Headsets, Car Audio Product Name: USB Bluetooth Transmitter Input Voltage: DC5V Material: ABS + PC Bluetooth Version: V5.0 Bluetooth Distance: Less than 10 meters TF Playback Format: MP3, WAV, FLAC, WMA Key Features: Stable Bluetooth 5.0 connection with dual device support. Converts Bluetooth to 3.5mm AUX for wide compatibility. Built-in microphone enables hands-free calling. Supports TF card music playback with high-quality formats. Includes remote control for easy operation.