Rock out to your favorite tunes while out and about with the Goal Zero Rock Out 2 Wireless Speakers. These speakers run for 10 plus hours and recharge via USB in two hours so you can quickly get back to rocking out. Recharge by: USB, Solar, Run Time: 10+ Hours, USB Recharge Time: 2 Hours, Ideal for: Guide 10, Switch 8 and Nomad 7, Model Year: 2016, Product ID: 434379, Model Number: 94017, GTIN: 0847974003510