1、More Compatibility: Automatic connection and memory pairing when booting, compatible with most bluetooth devices such as for google, for iPhone, etc. 2、Hands Free Audio Reception: A wireless bluetooth FM transmitter adapter for car radios, which can transmit calls, MP3 music, and mobile phone voice to the car speakers. 3、Intelligent Conversion: Built in microphone, automatically switch from music playing state to hands free mode when answering a call, one key answer, rejection, and recall. 4、Car Battery Voltage Function: When plugged into the car socket, the voltage is displayed for 3 seconds, and the battery is always in a healthy state. 5、High Performance: Support bluetooth, MP3 and other players, with anti interference performance and CVC technology, you can listen to music while charging. 1 x Bluetooth Adapter Item Type: Bluetooth PlayerMaterial: ABSColor: BlackModel: E6Function: Bluetooth Adaptation, FM TransmissionScope of Application: CarBluetooth Hands Free CallingEcho Cancellation and Noise Processing During a CallStereo Bluetooth and FM Transmission TechnologySupport USB, Memory Card (Not Included), Bluetooth ConnectionSupport MP3 Format MusicAutomatic Power off Memory FunctionCigarette Lighter Power Supply, DC12V-24V Voltage Power SupplyBluetooth Version 5.0, FM Transmitting Frequency 87.5-108MHzVoltage Detection