4 Lithium Ion batteries required.

50W HD Sound With Punchy Bass – Get a 50w output power and the latest state-of-the-art 4 drivers (2 passive subwoofers and 2 tweeters) and double passive bass radiators are located on the right and left side of the loud bluetooth speaker producing punchy bass and true HD sound. With the loud bluetooth speaker, you will feel best atmosphere for new year party, indoor and outdoor activities, jobsite, gym and Thanksgiving Christmas parties.
100W Powerful Beast Stereo Sound – Easily pair two portable speakers, Upgrading 100W stereo surround sound immediately. The powerful bluetooth speaker bring sound to life for a fantastically dynamic Audio experience. When you listen to music, watch movies, or play games, the two powerful Bluetooth speakers creating left and right channels immediately brings you extraordinary clarity and detail. The Bluetooth speakers really make great Thanksgiving and Christmas gifts for women and men!
IPX6 Waterproof And Power Bank Function – As a Power Bank to charge your smart device. There is a massive rechargeable battery, a single charge gives you enough juice to 40 hours of playtime. IPX6 waterproof mechanical casings makes it suitable for outdoor activities and passive radiators covers prevent accidental bumps and drops. Take the waterproof rugged bluetooth speaker with you on camping trip or beach party!