3-inch Universal Wheel Kit without Brakes, Silent

The strobe alarm lights are powered by solar energy and DC charging, and can operate for a full day after a full charge in sunlight for 8 hours. It can be charged via a DC power adapter for approximately 1 hour on rainy or cloudy days. The solar-powered audible and visual alarm motion sensor is suitable for homes, farms, barns, garages, yards, villas, hotels, factories, schools, orchards, and other locations requiring a security alarm.