Features: 1.Ultra-bright LED used. 2.Single-side alternate flashing – longer warning distance. 3.24 hours a day/7 days a week flashing warning. 4.Aluminum alloy body and powder coated surface – better weathering resistance. 5.Replaceable storage battery – longer lifespan. 6.High-efficient solar power battery – saves other power source and easier for installation. 7.Tempered glass enclosed solar power panels – tougher surface to resist against impact and scratches in providing longer lifespan. Applications: For installing at the tunnel portal, separation island, bridge end and remote warning location.