This product is powered by 4*800mAh 18650 lithium batteries, and the maximum battery capacity can be expanded to 10000 mA. The most prominent feature of the product is that it can not only provide stable power, at the same time, Bluetooth music can be played. The product comes with a flashlight, which has already exploded in an emergency. The product is light and durable, and is equipped with solar panel charging function, which is very suitable for outdoor adventure emergency power supply.