This product can provide electronic invoice.Features:8 high power white LEDsEngineer grade reflective FilmFull Charge Run Time: 96-120 hoursSolar Panel Output: 12 volts, 5 wattsFlashingCharging Time: 6-8 hoursEasy installationProduct Details:- Size: 24''x24''- Battery Capacity: 12V/5AH- Duration on Rainy Days (Fully Charged): 5 days- Thickness of the Aluminum Plate: 1.5mm (Customizable)- LED Luminance: >6000mcd- LED Light Working Life: 10,000H- LED Flicker Frequency: 40-60/min (Customizable)- Visual Distance: 0.5 mile- Mounting: U-shape Hoop mount (Customizable),Applicable column diameter: 76/89mm (Please contact us if you need other sizes).Tips:1. Please install this sign where there is no shade from the direct sunlight.2. Please check whether the LED lamp can work normally before installation. First turn on the switch, then cover the solar panel to simulate the night state and see whether the LED lamp can work normally.3. The direction of the solar panel needs to be calibrated during installation. The best angle in the direction that can receive the longest direct sunlight in a day.4. Please clean the dust on the solar panel every 3 months to ensure that the solar panel can generate electricity normally.5. Please turn off the switch to prevent the battery from draining out if not in use for a long time,. It needs to be charged in full sunshine for 3 days before normal use if not used for a long time.6. Please do not disassemble this product without our permission.