WONFAST Waterproof Solar Path Ice Cube Rocks LED Frosted Glass Brick Paver Garden In-groud Buried Light for Outdoor Path Road Square Yard(Blue) Powerful led, no wiring or batteries required Built-in 300mAh NIMH rechargeable battery. Waterproof, 8-10 hour night illumination Charge via sunlight during the day and light up at night Each light measures: 7cm x 7cm x 5.2cm