Harman/kardon onyx with; powerful 50w speaker delivers amazing sound quality in a wide frequency response range of 50hz to 20khz bluetooth 4.2 connectivity allows you to pair up to 2 devices at once so you can share dj duties with a friend and switch between devices effortlessly built-in rechargeable lithium-ion battery of 3,250mah provides up to 8 hours of continuous playback time, so you can keep partying all day or night supports wireless dual sound by connecting a pair of onyx studio 6 speakers (additional speakers sold separately) together to deliver immersive audio in every corner of the room ipx7-rated design is waterproof to withstand splashes and moisture so you can use it anywhere round silhouette with premium fabric finish lends a stylish appeal to the speaker aluminum carrying handle offers durability and allows you to carry the speaker anywhere with ease