Solar Powered Cap Warning Lamp LED Flashing Lights Road Barriers Traffic Barriers Square Flashing Obstacle Lights led lights Features: Chip control: The warning light is controlled by the chip. Solar power supply: solar power supply, no need for electricity, energy saving. Easy to install: Compact design, no additional tools required, easy to install. Applicable uses: suitable for home, yard, outdoor transportation, etc. Specifications: Material: PC+iron Size: 8080mm Color: red ,yellow Number of LED lights: 4 Visual range: 500-1000 meters Product overview: Solar column caps, no wires, no batteries. Automatic charging during the day and flashing automatically at night. Durable, no maintenance required. Application scenarios: guardrail posts, fences and other tops. Noted: 1. Please fully charge the device under sunlight before first use. 2. If there is no enough sunlight in 3 months, the battery may run completely flat, and will decrease battery life, so please charge in time. Once it's fully charged, unlock the device and lighting system. Otherwise, it won't work anymore. 3. If there is no enough sunlight, especial in North countries. it may take longer time to fully charge the device. This is very normal for solar products.