Frequency range
The FM frequency range supported by the FM transmitter.
For normal use of the device, it is necessary that at least part of this range coincides with the tuner range in the car radio, and that there is no full-fledged FM station broadcasting at the selected frequency. However, most modern FM transmitters cover frequencies of the order of 88 – 108 MHz, this is quite enough to find a suitable frequency.
Charging port
The transmitter has a specialized
USB port for charging smartphones, tablets and other external devices.
Note that you can also charge external devices from conventional USB connectors; however, specialized ports provide higher power output, which can significantly reduce charging time. It is also worth mentioning that the specific purpose of such a connector can be different: in some models it works only as a power source, in others it can also be used to connect USB drives. Many FM transmitters have two USB ports — regular and charging; this allows you to simultaneously charge an external gadget and listen to music from a USB flash drive. And in modern devices, the old USB A form factor is supplemented by a modern
USB-C port.
24V support
Possibility of operation of the device with automobile networks with a voltage of 24 V.
Such tension is found in heavy equipment — in particular, buses and main tractors (“trucks”). By default, FM transmitters are usually made for the 12-volt on-board networks of cars; therefore, for
installation in a 24-volt network, you need to choose a model where this possibility is directly stated.
