Highlights: Circuit control module AC/DC power charge jack Power switch Power indicator light (25%, 50%, 75%, 100%) Compatible with Apple iPhone 4 Specification: Dimensions: 13 x 6 x 2 cm Weight: 91.7g Panel Type: Multi-crystal silicon Solar Energy Conversion: 16% Built-in Li-ion Battery: 3.7V 1500m Ah Output Voltage: 5 V Output Current: