Solar Panel Single Crystal Silicon (0.36W/2V) Max. Dimension Dia: 135 x H: 50 mm Cuthole Dia: 120 mm Light Source Super Bright Anti-Fog LED Chip Light Color Red, Yellow, Blue, White, Green Display Mode Flashing (Approx 90/Minutes) Visibility >800 Meters Working Temperature -20 °C ~ +70 °C Material Cast Aluminum + P