Bluetooth wireless speaker with 66mm large-diameter speaker, dual light-transmitting diaphragms, built-in FM radio, and USB The portable mini speaker is water-resistant (IPX7) and can seamlessly withstand showers, spills, and beach outings while maintaining its performance integrity. The Bluetooth speaker's lightweight design brings unprecedented convenience. It can be easily put into a pocket, bag or backpack, making it an ideal choice for mobile entertainment needs such as hiking and picnics..syi