Real Time Detect The Voltage State
This fm bluetooth transmitter car has LED display, which can show your car voltage in real time to ensure your car safety!
1.12V or below:need to replace the battery.
2.12.0-12.8V:normal voltage for car not started.
3.13.0-14.8V: normal voltage when the car is starting.
Note: If your car does not start and the voltage is below 12V, please replace the battery immediately.