The Solio Bolt solar charger is your perfect companion, keeping you online and in-touch on the go. With an onboard battery and rotating solar panels, the Solio Bolt charges popular USB powered gadgets from your smartphone and MP3 player, to your e-reader, GPS, light and camera. So whether you need more juice to listen to that one song again, check in with a loved one back home, or just update your status...the energy from the sun and the Solio Bolt will keep you connected! Charge Rate: 10-12 hrs (solar), 4.5 hrs (USB). Dimensions: 4.7" x 2.5" x 1.3". Wt: 4.8 oz.