BS1 Ultra-Portable Bluetooth Speaker, Bluetooth 4.0 and Aux Line Connection, Built-in Mic and Auto Shut-off function Travel Outdoor Wireless Speaker, for iPhone iPad iPod Samsung Tablet Laptop MP3 Water-proof design, Water resistant, splash-proof, shockproof, dust-poof, available both for indoor and outdoor use. Built-in Microphone and Auto Shut-off function when no device pairing successful in 15 minutes. Universal compatibility for Android, iPhone and other Bluetooth-available digital players or media devices with aux port. Build in a rechargeable 1800mAh Lithium battery, enjoy 8-10 hours non-stop music. Exquisite Aluminum alloy design with solid performance in a weight about 13.6 ounces, perfect for your travels and camping.