Aviation obstruction lightModel: TYN-BY (J) Twinkling Frequency: 20-65/minute (can be adjusted)Light Source Applying Time: 100,000 hoursEfficiency Brightness: 2000cdPower Supplying Mode: solar panel and maintenance free storage battery.Working Voltage: 12VStorage Battery Capacity: 12V/7A/H per battery�Solar Cell: 16WTemperature Suited: -40oC~70oCWeight: 15Kg