The portable analog radio OPR-3040B by Osio takes you back to an earlier era with its classic retro style, but with modern technical features. It has Bluetooth version V5.3, allowing you to connect devices with the same technology, such as a mobile phone, and listen to your own playlist. Additionally, if you have songs stored on a USB device, you can insert it into the corresponding USB port, and the speaker will automatically play the stored songs. In the AUX input, you can connect audio devices wired with a 3.5mm cable or choose your favorite radio station and listen to music from there. The OPR-3040B radio-speaker stands out for the built-in subwoofer at the back of the device, as it provides special resonance and intensity to the sound with rich bass and realistic sound effects!