SoundPro Bluetooth Multi-Link Solar Rechargeable Wireless Rock Speaker (SPS-4001) DESCRIPTION - Easy set up with Bluetooth® and completely wireless. Pair with any Bluetooth® enabled device to one and run up to 99 of the same speakers all playing the same music. Fully self-contained internal rechargeable battery with both solar or USB recharge options. Fill your backyard, patio, or pool area with rich, fabulous sound remaining unaffected by the elements. SoundPro® 4000 speakers are available in a