【Dual-Function Bluetooth Adapter】This 2-in-1 device functions as both a transmitter and receiver, enabling wireless audio connectivity for your car stereo system 【Advanced Bluetooth 5.3】Featuring the latest Bluetooth 5.3 technology for improved connection stability, faster pairing, and enhanced audio quality 【Wireless Transmission】Converts your car's FM system into a Bluetooth-enabled system, allowing you to stream music and calls wirelessly from your smartphone 【Wide Compatibility】Suitable for various devices including smartphones, tablets, and MP3 players, making it versatile for different audio sources 【Compact Design】With a sleek, modern appearance that complements any vehicle interior Specifications: Model: W11 Material: ABS plastic with zinc alloy frame Bluetooth Version: 5.3 Charging Voltage: 5V Transmission Distance: 5-10 meters Operating Temperature: 0-55℃ Battery: Built-in 120mAh lithium battery