Sonic Walk Neo Strapeaker Backpack Attachable Bluetooth Speaker System SW-BP610-1 - Wireless Outdoor Speaker for Hiking, Camping & Travel - Waterproof & Durable (Black)

The Sonic Walk SW-BP610 can be attached to conventional backpack straps. You can enjoy music using your existing backpack for cycling, mountain hiking, or even carrying to school. Because the speakers arent located directly toward your eardrums, it lessens the chance of hearing damage compared to earphones or headsets. Its Li-Polymer battery lets you charge the power by just connecting to USB 2.0 ports in your computer, and once fully charged, it lasts up to 10 hours depending on the music and the volume. Also, 3.5mm stereo jack allows you to connect any types of MP3 players.