MZ M405SP Portable Bluetooth Speaker, also known as the "Mini Bomb". 

It features a long-lasting battery with approximately 4 hours of play time. 

The speaker has multiple connectivity options, including Bluetooth 5.0, TWS (True Wireless Stereo), and a TF (micro SD) card slot. It also has a built-in FM radio. 

The speaker is USB chargeable and has a 1200 mAh built-in rechargeable battery.