ION Audio Cornerstone | Water-Resistant Wireless Outdoor Speaker with Rechargeable Battery (Single) 6.5-inch full-range speaker and powerful onboard amplifier really pump up the volume 50-hour rechargeable battery provides long-lasting, uninterrupted music IPX4 water-resistant so you can leave it out in the rain Wirelessly streams music from any Bluetooth device (up to 100'); Connects wirelessly to additional Cornerstone speaker (sold separately) for stereo sound (up to 30'); Completely wireless operation: no power cord, no audio cables Fits perfectly into any corner; Designed to look good anywhere-outdoors or inside