I CALL NAME OF TRUST v4.1 Car Bluetooth Device with Car Charger, Audio Receiver, FM Player  (Black)

Car Charger,FM Transmitter&Music adapter,2.1A Dual USB Port 1.0A Dual USB : One is 1A, can charge small screen cellphone,camera and read USB data.Please use pure charge line when use this one charging. Another is 2.1A, can charge for ipad, big screen cellphone etc. Input voltage: 12-24V,Output voltage : Max 5V DC/3.1A 2.Frequency Connect: The device FM frequency is 87.5-108MHz.Please turn car radio channels to one of Frequency 87.5-108.0Mhz.Then plug the device, make sure the car charger keeps the same frequency to the car radio channels: 1.Choose an blank and clear channel in the car audio. 2.Long press the FM transmitter answer key until the LED display flashing. 3.Turning the answer knob adjust the same channel at FM transmitter. 4.Short press the answer key to fix the channel. 5.Connect phone bluetooth or insert the USB/TF card, FM Transmitter will start to play. Please repeat above steps if has noise interference in the radio. 3.Bluetooth Function : 1.Power on the device, there is a prompt voice : Bluetooth is ready to pair. 2.Turn on smart phone Bluetooth search the name of HY82. 3.After connected, there is a prompt voice Bluetooth connected successfully. 4.Bluetooth function can transfer music from phone to car speakers or answer phone handsfree. 4.Music Function: Please noted the priority play sequence is Bluetooth>TF card>USB 5.Car Battery Voltage Function : For 12V /24V car, voltage display of car battery under 11.5V /23.1V or higher than 14.9V/27.3V means car battery issue. Features: 1.Weight :45G 2.Screen : LED 3.Support TF card/ USB:?32GB .Working condition:0-60 degree 5.