OVERVIEW: Ultra-powerful 40W Bluetooth Speaker with Subwoofer: Built-in 10,000mAh Power Bank to keep your device charged: LED Lights glow and change colors with the music: IPX7 Waterproof rating: Built-in mic for hands-free calling: Clear, crisp sound with deep bass: The latest Bluetooth V5.0 & TWS technology allows you to pair any two speakers from the Austin range: