Features: 1.Ultra-bright LED used. 2.Single-side alternate flashing 每 longer warning distance. 3.24 hours a day/7 days a week flashing warning. 4.Aluminum alloy body and powder coated surface 每 better weathering resistance. 5.Replaceable storage battery 每 longer lifespan. 6.High-efficient solar power battery 每 saves other power source and easier for installation. 7.Tempered glass enclosed solar power panels 每 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.