Materials: Boron-Silicon Glass Solar Cell: Mono Crystalline Silicon Solar Cell Vm: 1.92 V Im: 500 mA Storage Battery: AA 1.2V Ni-MH 4000 mAH Rechargeable Battery LED Lamp: φ5 Super Bright LED 8 Pcs Illuminating Time: 14 Hours (At Optimization Condition One Day Charging) Working Temperature: -20 °C To 85 °C Waterproof: Excellent