From JBL, their Charge 3 Waterproof Portable Bluetooth Speaker. This model comes in black. Model: JBLCHARGE3BLKAM

Features:
- Bluetooth - Wirelessly connect up to 3 smartphones or tablets to the speaker and take turns playing powerful stereo sound.
- Battery type : Lithium-ion Polymer (22.2Wh)2) 20 hours of playtime(varies by volume level and content)
- 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.
- 6000mAH power bank
- Built-in rechargeable Li-ion battery supports up to 20 hours of playtime and charges smartphones and tablets via USB.
Model Number: JBLCHARGE3BLKAM