This is a 4-pack of 42" solar driveway markers used to help visibility during poor weather. The markers have two settings, steady and flashing and recharge during the daylght over a 6-8 hour period. Once charged, markers provide 6-8 hours of steady illumination, or 12-14 hours of illumination on the flashing setting. No wires needed to install these items. Easy to install foot cleat included.