Jackery Boom - Wireless Bluetooth 4.1 Speaker 10W Subwoofers IP65 Water Resistant Dustproof Rugged Portable Bluetooth Speaker for Biking, Hiking, Camping, Beach, Poolside Party Outdoor Activities Jackery: the Power Source for Mobility Clear wireless connectivity - Bluetooth 4.1 enabled speaker allows you to be connected to all bluetooth compatible mobile devices Powerful boomin sound - 10W of powerful sound from dual 5W stereo drivers and passive radiators, perfect for any music style in your outdoor lifestyle Long-Lasting - 2000 mAh rechargeable lithium battery provides up to 8 hours of playback and can be easily recharged. Microphone features means you can also use the Boom as a conference call wherever you are outdoor style! [18 months Warranty time and Portable and Light Weight Design]: The speaker size is 7.91*4.4*2.36 inches and weight is only 19.75 ounces, you can carry it with you easily at anytime and anywhere, especially when you out for bike riding, beach, camping or indoor for shower.