[Strong Magnetic Base] No wiring or assembly is required for installation. Strong magnetic base securely attached to any metal , even on moving or vibrating equipment. [Solar-Powered Charging] Powered by solar energy, these solar flashing light charge automatically during the day and turn on automatically at night (the light only work at night and doesn't have switch) [High Brightness] Featuring high-brightness LED beads and excellent light transmittance lampshade, in complete darkness, its visible range up to 500 meters(0.3 miles) [IP54 Waterproof] With an IP54 classification, the solar flashes lights are to all types of bad weather, including fog, rainstorms, blizzards, and intense day heat [Wide Application] This solar safety light can be installed on guardrails, construction sites, , mailboxes, driveways, vehicles or any place that requires a warning signal Colour:Yellow Material:Plastic Package Contents: 4 * Safety Light Outdoor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.