YAKAR 4 of 1 12-24 Volt Car Kits Wireless Bluetooth FM Transmitter,3-Socket Cigarette Lighter Adapter,Dual USB Car Charger,Battery Voltage Overload Alarm LCD Display(Gold) [FM Modulator Radio Adpater and Hand Free Phone Call]--Adjust the FM transmitter frequency to match the car radio FM channel.Then the car radio became the louder speaker of your phone and display the audio resource from your phone.Make your car become a wireless MP3 player.Advanced interference and noise cancellation technology.Enjoy the stereo and fidelity music.Bluetooth Calls. [Cigarette Lighter Splitter]--3-Socket Splitter extend the cigarette lighter port make your car can use more car electronic device which with cigarette lighter plug.Total output power:120W.Input volyage:DC 12-24V. [Dual USB Car Charger]--Come with a 1.0A and a 2.1A USB charging adapter port.And it support you charging your iphone mobile phone and macbook ipad tablet PC together. [Battery Voltage Overload Display Screen]--Suit for 12-24 volt car.12V battery car in the voltage is lower than 11.6V higher than 14.8V will prompt the voltage abnormal; 24V battery car voltage is lower than 23.2V higher than 27.2V will prompt the voltage abnormal. [Universal Compatible]--Most of the Bluetooth enabled devices, like iPad, iPhone, iPod, HTC, Galaxy, Blackberry, MP3 Players, PDAs, Smartphones.