JstBuy CARG7 Bluetooth FM Transmitter Universal Wireless in-Car FM Adapter Car Kit with Hand Free Call/Stereo Music Player and USB Car Charger for All Android & iOS Devices (Golden) JstBuy CARG7 Bluetooth FM Transmitter Universal Wireless In-Car FM Adapter Car Kit: This Bluetooth FM Transmitter Adapter is a Multifunctional Hands Free Car Kit. It transfers Bluetooth signals (Media and Phone Audio) from your Bluetooth enabled devices directly to your car audio system via FM signal or AUX-in port Supports USB drive playback, you can enjoy music or answer calls hands free from your car audio system. Charge your device straight through the USB interface (5V/2.1A power output). FEATURES:  Wirelessly transmit phone call from Bluetooth mobile phone to the car FM stereo system Single USB output to charge external devices (DC 5V/2.1A) Power Supply by the cigarette socket in the car (DC 12V/24V) Supports TF Card Slot/AUX-IN Switch to Hands-free mode automatically from music playing status when receiving calls Draws power from the cigarette socket in the car LED display Full range of channels optional from 87.5-108MHz  SPECIFICATIONS:  Frequency Response: 20Hz-15Khz FM Transmitter Frequency: 87.5-108MHz Supported Format: MP3, WMA Rated Operating Voltage: 12V Ultimate Operating Voltage 9-26 V SNR Ratio > 60dB Left/ Right Channel Separation > 60dB Bluetooth Version: 2.0 Bluetooth Transmission Distance: 10-15 meters  Package Includes: 1 x CARG7 Bluetooth FM Transmitter