This ingenious gadget from Alza is now on sale! For 524 CZK, it adds phone music, handsfree, and fast charging to an old car.

Do you have a car radio without Bluetooth and don’t want to replace the entire unit because of it? An FM transmitter is the simplest solution — and the AlzaPower F140 can now be purchased for 524 CZK with the discount code AUDIOVIDEOTYDNY25 (regular price 699 CZK). For five hundred crowns, you get a device that combines a music player, handsfree, charger, and car battery voltage meter.

Quick summary:
✅ Makes sense if you have an older car without Bluetooth and want to listen to music from your phone, use navigation aloud, or make calls via handsfree.
⚠️ Consider that FM transmission has its limitations — the sound is mono, the volume is lower than with a direct connection, and in some cars, noise or interference from the alternator may occur.
💡 For 524 CZK, you get Bluetooth 5.3, two fast-charging ports, and solid features that have convinced over 20,000 buyers on Alza.

What it can do for five hundred crowns

You plug the AlzaPower F140 into the cigarette lighter socket (12–24 V), tune your car radio to a free FM frequency, and pair it with your phone via Bluetooth 5.3. Subsequent connections happen automatically — you get in, start the car, and it plays. In addition to Bluetooth, you can also play music from a microSD card or a USB flash drive (MP3, WMA, and FLAC formats, max. 32 GB).

Handsfree works via the integrated microphone and a multi-function button — you can answer, end, and reject calls without touching your phone. The transmitter also supports activating voice assistants like Siri, Google Assistant, and Bixby with a long press of the button.

A pleasant bonus is two charging ports: USB-C with Power Delivery 20 W and USB-A with Quick Charge 3.0 (18 W). However, when charging two devices simultaneously, the power decreases to 15 W. The display shows the current FM frequency and car battery voltage, around which adjustable RGB backlighting flashes — this can also be completely turned off if you’re not keen on a colorful disco in the interior.

What real users say

With a rating of 4.5 out of 5 from 500 customers and over 20,000 units sold, the F140 is one of the most popular transmitters on the Czech market. The return rate is low — 1.31%. Most users praise the simple setup, stable Bluetooth connection, and the fact that for a few hundred crowns, they get complete multimedia equipment for an older car.

The most common complaint? Volume. FM transmission is inherently quieter than a direct connection — both the phone and the transmitter need to be turned up to maximum. When switching back to a regular station, the sound might then surprise you. Some users mention occasional hissing or buzzing, which depends on the quality of the car’s electrical system — it can be more pronounced in older vehicles with poorer alternator noise suppression. A few reviews point out that the display backlight cannot be completely turned off (the blue frequency always illuminates) and that the transmitter does not turn off after removing the key if the socket remains powered.

Who it’s for and who it’s not for

An FM transmitter is ideal for drivers of older cars without Bluetooth and without an AUX input — if you only have a radio and a cigarette lighter socket in your car, there’s practically no better way to play Spotify or navigation. At the same time, it serves as a solid car charger thanks to USB-C with Power Delivery.

Conversely, if your car has Bluetooth or AUX, you don’t need a transmitter — a direct connection will always be of higher quality. And if you are audiophiles who listen to lossless FLAC quality in the car, FM transmission simply won’t satisfy you. But this applies to any FM transmitter, not just this one.

Do you use an FM transmitter in your car, or do you already have Bluetooth directly in your radio?