Size: 312*36*30mm   
Charging voltage: 4.5V        
LED lifetime: 100,000 hours(chip form Japan)         
Charging time: 6-8hours    
Lighting time: Strong light 8 hours or more,soft light 180hours or more.                               
Inner Lithium: 5200mA battery,Japan                   
ISTB: 9μA                           
ECTEL: 4000 hours
Golden, silver, blue, black,red and so on.