This high-efficiency solar panel allows you to power your favorite bark control device 24/7 without the use of expensive batteries or cumbersome wires. It's especially great for using your Dog Silencer in high-up or hard-to-reach areas like tall trees or second-story windows. Just set it and forget it! Economical By skipping the use of batteries, you save money and help the planet. Weather Resistant Rain and sprinklers are no problem for the Solar Panel's IPX4 waterproof rating. Compact & Discreet About the size of a smartphone, the Solar Panel can blend in just about anywhere. Easy to Use Includes an AC adapter for charging the panel on cloudy days, and an LED indicator light to let you know when it needs charging. WHERE TO USE IT HOW IT WORKS This Solar Panel is perfect for out of reach areas, where plug-ins and extension cords won't do the trick. Mount your solar panel to trees, fences, decks, posts, or anywhere there is a direct line of sight from the sun to your solar panel. Going cordless gets you closer to the neighbor's dogs than ever before, while saving you money and giving you peace of mind! The solar panel will be fully charged and ready to use after 8 hours of direct sun, and will continuously power your Dog Silencer while it's attached. For dark or cloudy days, feel free to charge your Solar Panel using the included AC adapter. To prolong the life of your Solar Panel, always make sure the power input and output ports are facing downwards to avoid water entering those openings. What's Included Solar Panel AC Adapter for charging 10-Foot DC Cable Mounting hardware & optional strap Details and Specs Dimensions: Panel: 4.75″ T × 3.2″ W × 0.56″ DBase: 3.2″ diameter base; 4″ T Output: 9V Charging Time: 8 Hours (minimum) AC Adapter: 110v