-Weather-resistant solar panel to power your Ring doorbell -Adjustable mounting bracket for maximum exposure Only works with Video Doorbell 3 & Video Doorbell 4 -Connects to Ring video doorbell for a continuous charge, a few hours is of sunlight is all you need so your Ring doorbell will stay charged around the clock. -With an included mounting, toolkit and cable, you'll be set up in just a few minutes. Ring recommends at least 3-hours to 4-hours of direct sunlight, depending on your usage, you will want to make sure there are no obstructions that could be casting a shadow on your Ring solar panel such as an extended roof, trees, bushes, etc. Product dimensions: solar panel: 2.24 x 5.87 x 8.03 in / cable: 20 ft. (6.1 m) L / Product Weight: 1.46 lb Connection: micro USB connector Solar panel power rating: 2.4-Watt, 5-Volt DC New in box, never opened