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Comparison Grand-X CUFM99GRX vs Havit HV-FM807BT

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Grand-X CUFM99GRX
Havit HV-FM807BT
Grand-X CUFM99GRXHavit HV-FM807BT
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Main
QuickCharge 3.0 fast charging function.
TypeFM transmitterFM transmitter
Frequency range87.5 – 108 MHz87.5 – 108 MHz
Features
Screen
Bluetooth
AUX (Line-in)
Hands free
Bass Boost
Interfaces
USB input
Card reader
Media supportMP3, WMAMP3, WMA, FLAC, APE, WAV
General
Charging portUSB-A and USB-CUSB A
Fast charge
Quick Charge 3.0 and Power Delivery 3.0 /PD (20 W) and QC 3.0 (18 W)/
24V support
Added to E-Catalogoctober 2022august 2020

AUX (Line-in)

Wired audio input, usually in the form of a standard 3.5mm mini-jack. The line-in (Aux) input can usually be output from a normal headphone output on a mobile phone or other similar device. And in some models of FM transmitters for linear connection, even their own wire with a 3.5 mm plug can be provided, which eliminates the need to use third-party cables.

Bass Boost

Bass boost function for powerful and rich bass. Bass Boost is implemented in the form of a single button, with which you can actually “turn the bass on and off”.

USB input

The USB connector allows you to connect external drives to the FM transmitter — primarily flash drives and portable MP3 players — and play music from them directly. In some models, this port can also be used for service purposes — for example, to connect to a computer and change settings.

Card reader

A slot that allows you to install memory cards in the FM transmitter and play music from them. Most often, card readers are made for SD or microSD form factor cards; however, both varieties have several variations (SDHC, SDXC), so before using such a transmitter, it's ok to clarify which varieties the card reader is compatible with.

Media support

File formats supported by the FM transmitter.

Almost all models support the MP3 format, which is the most common modern digital audio format. Some devices are also capable of working with WMA — this is also one of the main formats, but for a number of reasons it is used much less often. And even less common is compatibility with WAV — this format provides higher sound quality, but with FM broadcasting this advantage is lost, and the files themselves take up noticeably more space than MP3 and WMA.

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.

Fast charge

The quick charge function, as the name suggests, allows you to significantly reduce the time spent on the procedure. This is achieved through increased current and/or voltage, as well as "smart" process control (at each stage, the current and voltage correspond to the optimal parameters). At the same time, the rechargeable gadget must also have a similar fast charging technology.
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