The fm at the end confused me because I thought it was also a radio, which deceives you from the radio antenna it has in the back... It says it's Bluetooth so I can use it through my phone... but the Bluetooth doesn't work... it doesn't find it anywhere when scanning... Only as an amplifier with an external device... I connected it to small speakers... I have to connect it to an external radio through the headphones to hear something... Ultimately, it is monophonic certified in a test with a video for speakers from YouTube. So it is purchased as a monophonic amplifier only if you have small speakers to connect it to a TV, computer, or radio through the headphones or if you play music with an instrument.

Very good sound with my speakers, of course Panasonic, very easy to connect with the speakers and with the CD, very good with USB, plays all day without any heating issues so far, no problems at all, I recommend it