Very loud forthe small size. It is an easy to sycn to your bluetooth device speaker. It is waterproof so good to use durring a shower or outside camping. It is rechargeable and comes with a USB charging cord. A charge will last about 8 hours. There is a rubber brotected port area in the back of the speaker where the charging port and Support FM AUX TF Card USB. #Rankboosterreview #Sponsored #Barsone https://www.amazon.com/Portable-Wireless-Bluetooth-Resistant-Handsfree/dp/B076P4YNJ1