Highlights: Panel Type: Multi-crystal silicon Circuit control module AC/DC power charge jack Power switch Electric power indicate light (25%, 50%, 75%, 100%) Compatible with iPhone 3G/3GSSpecification: Dimensions: 13 x 6.5 x 2.5 cm Weight: 760g Solar Energy Conversion: 16% Built-in Li-ion Battery: 3.7V 1500m Ah Output Voltage: 5 V Output Current