Size:5.5X3.5X1.3cm 【Bluetooth Technology】Using the latest Bluetooth chip, it will automatically connect when turned on. After the mobile phone is paired with Bluetooth, connect it you to the AUX audio jack, and the audio without Bluetooth function can be transformed into Bluetooth audio, which can not only make calls, but also listen to dynamic music. Travel is no longer lonely. 【Intelligent noise reduction technology】This Bluetooth car adapter adopts CVC noise reduction technology and DSP signal processing technology, the transmission distance is longer, the call is clearer, and supports support MP3, WAV, WMA, FLAC, APE and other lossless music, allowing you to enjoy the wonderful music 【Built-in high-performance independent amp】Built-in amp not only improves audio performance, but also also has a delicate and durable sound quality. It truly restores the beauty of music and enjoys a more shocking auditory feast. The up/down button is designed on the fuselage. On the side, it is convenient for users to control Bluetooth music up and down while driving. 【Hands-free Calling and Navigation】Built-in microphone and buttons to answer, redial, hang up and reject calls help you make calls hands free. And the car Bluetooth adapter supports transmitting voice notifications from existing navigation apps. You don't need to look at your phone while on the road, ensuring safe driving. Note: The data is manual measurement, please allow some 1-39cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.