Additional FeaturesBluetooth - Wirelessly connect up to 3 smartphones or tablets to the speaker and take turns playing powerful stereo sound,Built-in rechargeable Li-ion battery supports up to 20 hours of playtime and charges smartphones and tablets via USB,IPX7 Waterproof,Take crystal clear calls from your speaker with the touch of a button thanks to the noise and echo-cancelling speakerphone,Build your own ecosystem by connecting multiple JBL Connect enabled speakers together to amplify the listening experience.