Esuper FM Transmitter for Car Audio Wireless Receiver Radio AUX Bluetooth Car Adapter with 2.0 Inch Display and USB Car Charger, Hands Free Calling;

User Instruction
1. You can press and hold the mufti-functional button to swich modes, such as TF card mode, U-disk mode, FM mode etc.
2. Find a vacant or non-interfered frequency and sync Esuper device to that frequency for minimized static noise.
3. To achieve best audio quality, please set the volume on your phone to maximum and then adjust the volume for your car stereo; you are not suggested to adjust volume of your car speaker to maximum (this will bring lot noise).
4. The multi-functional button can not only be used to change volume, but also can be used to adjust the FM frequency, easier operation by comparing with other products.
5. PC scratch proof lense, FM transmittion with no noise.
6. Has voltage measurement function.
7. To get a better quality sound, if your car has AUX input, we always recommend you to use the AUX cable.
8. To protect this device, we recommend to remove it from outlet after use, to avoid instant high start voltage damage the device.

Specifications
Version:V3.0+EDR
Frequency Range: 20h~20 KHZ
Sensitivity:-42 db+/3 db 360
Voltage:5v ±0.5
Frequency:2.402~2.480 gh2
Effective Range:10 meters (free space)
Sensitivity:-92 dBm
RF Output:4 dBm

Frequencies
FM:87.5MHz-108.0MHZ
H-to Transmitted Power87 dBuv/107 dBuv

What's in the box?
Bluetooth FM Transmitter*1
Audio cable*1
User Manual*1