iPERB Solar Powered Glass Waterproof Color Changing Ice Rocks LED Ground Light Indoor Outdoor Pathways solar lights(blue) No wiring or batteries required - built-in 300mAh NIMH rechargeable battery. size: 7cm x 7cm x 5cm Waterproof, 8-10 hour night illumination.Charge via sunlight during the day and light up at night Solar powered LED imitation glass ground brick lights for indoor, outdoor, or decorating use Illumination wherever extra lighting is needed and waterproof so that it can even be used on rainy days Press the button on the bottom, put the light under the sun to charge, and brick light will automatically illuminate at night