In the past few years, we have covered plenty of amazing Bluetooth speakers here. The Dosmix HM11 Mini Retro Speaker is also worth a look. It is a gorgeous Bluetooth speaker with a range of 10 meters that works with your favorite smartphones and tablets. It lasts up to 3 hours on battery.
The Dosmix HM11 mini retro speaker can work with Amazon Alexa. It has built-in mic for hands-free calls. You can find out more about it here.