Solar Lights: Solar powered, charged in direct sunlight for 6-8 hours, lights automatically turn on at dusk and off at dawn. There is a tab on the light cover, please remove it before charging. Automatic sensor activates at sunset and turns off at sunrise. Designed to fit specialty 2 x 2 fence posts.< /p> Weather Resistance: The outdoor solar light is made of high quality thick plastic, you don't have to worry about it getting rusty. Suitable for outdoor use, the light can work normally in any weather, IP44 waterproof, weatherproof, don't worry about rain, snow, frost, sleet Easy to install. No wiring required. Dimensions of each cap: 2 x 2 x 2.75. Battery is not included.