Description With sensors, solar charging during the day, at night will automatically light up. 2 to 3 days after the battery is fully charged (around the location and weather, etc.) No electricity, no wiring, energy saving Bottom switch ON, automatic light on & automatic light off. Solar type, equipped with solar cells, driven by light energy. No wiring, can be used with confidence. Scope of use Applicable to chimneys, Bridges, high-rise buildings, taxis, fences, port terminals, building construction, traffic construction, emergency situations, etc. specification Dimensions: Diameter 8 cm x height 14.5 cm. Weight: 160g. Solar charging (110 flashes/min) Material :ABS+PC Visual distance :500m Operating temperature :-20℃-60℃ Mode: Flashing (110 times/min) Note: This product has a switch, switch on, automatic charging by solar energy during the day, automatic flashing at night. Flashing lights will reduce power shortages due to transportation reasons. Please place the product face up for more than 4 hours before use. Due to the different shooting light and display, the actual color and size of the product may be slightly different. If you have any questions or questions about the product, please feel free to contact us.