Bluetooth speakers are everywhere. I think it's safe to say that they've replaced the receiver-based component setup as the main music delivery system for most people (unless you're into hi-res ...
Portable Bluetooth speakers have made it easier than ever ... If you've got audio on a USB drive or want to use an aux cable, you can also stick those into the back of the speaker to play music ...
It may have an unusual shape, but this battery powered Bluetooth ... the speaker. A full charge of the ES2’s battery takes arounds two hours using a 5V PD fast charger through the USB-C charging ...