Product size: 8.5 inches tall * 6.5 dia inches. Weight: 1 lb. Color: Black. * Solar panel: 6V 70mA. Built-in rechargable battery: 3.6V/500mAh. 10 hours of sunlight to charge the battery full. * 12 LED Linotrons. No bulb burn out, and replacement. * Adjustable brightness switches as easy as thumb pressing. * Less brightness for longer lighting time. Using 4 LEDs it lights up for 15 hours; 8 LEDs for 10 hours, and 12 LEDs for 5 hours.