road way safety,solar road stud,102*81*21mm size;4pcs led,Red, yellow,white,green etc. ItemSpecificationSolar cellTypeMono crystallineVoltage2 VCurrent100mABatteryTypeNi-MH ... continuously for over 72 hours by shined for 8 hours with standard luminous intensity Temperature range-20 °C---- + 70 °CCompression ... road way safety,solar road stud,102*81*21mm size;4pcs led,Red, yellow,white,green etc.