Anker Bluetooth Speakers, Splashproof Outdoor Bluetooth 4.0 Wireless Speaker with 10 Hour Rechargeable Battery and 360 Degree Stereo Sound and IPX4 Splashproof Design Anker Bluetooth speakers, Splashproof outdoor Bluetooth 4.0 wireless speaker with 10 hour rechargeable battery and 360 degree stereo sound and IPX4 Splashproof design