1,wind solar cell 2,CE,RoSH,ISO9001 certificate. 3,Good effect of lighting. 4,High power efficiency. wind solar cellEffsun solar energy characteristic ... and durability:under no wind and solar conditions can keep lighting 4days,above 10 hours per day.4,Battery protection: ... .9,Control:with battery voltage,controller temperature,charge control.10,Large powered Led Lamp can be divided to timely ...