Shanfu TB Bicycle Saddle Storage Bag with Heavy Duty Bluetooth Stereo AUX Speaker FM Radio Strong Bass Sound Waterproof Shockproof for Outdoor Sports Cycling Camping Climbing Hiking Traveling Shanfu is famous for being a professional manufacturer of sports bags. What makes Shanfu stands out is the idea of combining a Bluetooth speaker with a sports bag. A product that not only keeps your belongings, but also plays music for you. The TB Bicycle Saddle Bag is made of high quality nylon material which is light, durable and waterproof. There is also a hidden cover for the bag which makes it a double-waterproof bag. You can still use it when there is just a little rain in winter or spring. The bag is equipped with a heavy duty dual-channel Bluetooth 3.0 speaker, which is power-efficient and has long working time up to 7 hours. Only 3 seconds latency. And the transmission distance is up to 34ft in open space. The speaker is shockproof and has two powerful 6W drivers produce extreme loud stereo sound effect and strong bass. It also supports AUX sound output so you can listen music either wired or wirelessly. The speaker can be detached from the backpack for separate use. You can either leave it at home or bring it out for cycling, camping, hiking, climbing, picnics, BBQs, beach or park gatherings and more outdoor activities.