BAVISION Waterproof Bluetooth Speakers,15+Hours 4400MAH Wireless and Instant Compatible iPods and iPhones, Built In Subwoofer, Portable Design Works Great Outdoor Black Ultimate water resistant outdoor gadget includes one-click flashlight and USB charging port to meet the demands of an active lifestyle Exceptional 4.0 bluetooth technology connects with no pin code or hassle; power on within 33 feet of device and pair in just seconds Premium 2 5W speakers with impressive bass; rechargeable 4400 mAh battery provides over 10 hours of audio playback Equipped with a quality microphone for hands-free calling; loopable clip ties on your backpack for easy portability 100% satisfaction guaranteed; return for a full refund if you do not enjoy for any reason; no questions asked