1. Solar Panel: Peak power supplied by photocell:1.54 W Operating voltage: 5.5V(max) Charging current: 280mA 2. Solar Charger: Battery capacity: 2800mAh /3.8V Output voltage:4.5-9V(adjustable) Output current1A (max) Output power4W (max) Battery life>500 cycles Dimensions: 137*79*24mm Weight240g 3. Product Specifications Input interface: DC interface Output interface: USB interface Material: Fireproof plastic (ABS) Intelligent LED display: 3 colored indicators (red, orange, green) for status of remaining power while charging and discharging. Flash light: LED light (For Lighting) Control switch: ON/OFF/LED Output voltage switch: 4.5V/5V/6.3V/9V