Item: solar road stud Model: FR-R003 Features: 1) Round shape design for high compressure resistance. 2) Both or single side LED available. Specifications: 1) Solar Power: 0.2W 2) Storage Battery: 1.2V/1800mAh 3) Charging Time: continuous 30 hrs 4) Size (mm): 130*20 5) Net Weight (N.W.):500g