Features: Enhances your driving experience with our aux input microphone, offering seamless integration with your car's stereo system without any modifications. This device supports aux input, USB playback, and hifi sound technology, ensuring clear music and call quality for a exceptionally auditory experience. For music enthusiasts and business professional seeking to elevates their in car entertainment and communication capabilities. Perfect for daily commutes, long road trips, or business meetings on travel, allowing you to enjoy uninterrupted music streaming and hands free calls, enhancing both efficiency and comfort during your travels. With easy installation and a robusts battery life, this device ensures you spend more time enjoying your journey and less time worrying about frequent recharges, making it a must have accessory for your vehicle. Specifications: Component:Plastic Size:Approx.5.5x5.5x2cm/2.17x2.17x0.79inch Color:Black Type: AUX input microphone Sampling frequency: 44.1/48/96KHz Frequency response: 20-20KHz Noise ratio: 95dB Frequency range: 2.402-2.480GHz Maximumly distance: 15m. Distortion rate: less than or equal to 1% Voltage: 12V Current: 20mA For W203 W209 W169 W245 W164 X164 W251 W221 R230 Package Includes: 1 Set Wireless Music Receiver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.