Solar celPre-Press Equipment l: single-crystalline silicon (3v,170mA) Storage battery: Ni-MH (2*1200mAH) / Super Capacitor (2*50F)Light source: super luminosity LED;LED quantity: 6 pcs Luminous mode: Constant Type (standard luminosity intensity) Work time: more thaPower Transmission Parts n 15 hoursWork temperature: -25 to +75 degree C.Material of light: Stainless steel and glassResist compression: 20tonsWaterproof grade IP>67Life: >5 years (Wheel & Caster Ni-MH) or >15 year ( Super Capacitor) View distance: over 800mGuarantee period:14 months