SOLAR CHARGING METHODS Using solar charging, there is no need for wiring or battery installation, just turn on the light switch to automatically charge during the day and light up at night usually the charging time is 3-4 hours, and the usable time is 18-20 hours. Excellent material & Anti-fall and explosion-proof Base is made with durable ABS with scratch-resistant PC lens. Waterproof IP67 Great for engineering Road Construction, emergency vehicles, postal service, construction vehicle, Truck Vehicle, Forklift, Tractor, Golf Carts, UTV Car, School Bus and safety warning etc. Can be hung and pasted as you need！