ION Audio Keystone | Mountable Wireless Solar-Rechargeable Outdoor Stereo Speakers with Remote Control (Pair) 2-way speaker with 4-inch woofer and 1-inch soft dome tweeter; 80 watt peak system power (40 watts x 2) Recharge by embedded solar panel or with AC power adapter (charges in 7 hours by AC, and 65 hours by Solar Panel) IPX4 water-resistant so you can leave it out in the rain Completely wireless operation: no power cord, no audio cables (wirelessly streams music from any Bluetooth device up to 100'; speakers automatically link together wirelessly for genuine stereo sound up to 30') Free-standing OR mountable - your choice (mount included, remote control included)