Meet the SPIROK SK5 Magnetic Fluid Speaker: a ferrofluid stereo speaker with 40w of power to deliver rich sound. It has Bluetooth 5.3 connectivity, so you can use it with your favorite smartphone and tablet. The magnetic fluid inside responds to your music.
The SK5 Bluetooth 5.3 speaker lets you attach a microphone for karaoke. It has 2 x 10W dome tweeters and a 20W woofer. You can find out more about it here.