Waterproof Waterproof, made of stainless steel material can be sealed well which is suitable for outdoor. Especially on a rainy day. Safe Design Safe without wire design, it adopts the working principle of converting solar energy into electricity, very suitable for outdoor use, never worry about the complex wiring and children’s security. AutoTurn ON/OFF These lights turn on automatically when it gets dark, so you'll always have light for your path, or to make your garden more beautiful. Bright And Efficient Solar powered design. Built-in 600mA Ni-MH battery, can light up about 8 hours after fully charged battery.No additional cable laying required. Warning Tips: For best results, the best is to be installed in a place where fully exposed to the sunlight, don't install it under the shadow where there are obstructions, such as trees, bushes, eaves, windowsill, etc. To ensure it can continuously absorb 6-8 hours of solar energy in the daytime. Built-in light sensor, if at night or dark area, which will automatically light on; if at daytime or bright space, it will automatically light off. To let it work properly at night, don't install it under an unnatural light source, such as under the street light, etc. If hard places, you'd better dig a hole before using the spike. Please keep the solar panel clean always. A dirty surface is not conducive to solar charging.