1. [Compliance] Ring door bell for battery charger for this solar panel , Ring video door bell 2 (not for the second gene), video door bell 3/3+, Video door bell 4, door bell 4 plus, door bell 2k camera, google nest door bell (battery). Doorbell Wire is not compatible with the video Doorbell Pro. Suitable to charge other devices .2. [Settled voltage regulator] Solar panel Surgeon Smart Protection Circuit, Excessive Charging Protection, Excessive Discharge Protection, Over -Voltage Protection, Over Current Protection, Short Circuit Protection, Reverse Protection, Multi -Protection, Safety and Internal peace and extreme environments; [Product Introduction]] This solar panel has 5V operating voltage, 6W output power, IP66 waterproof, monocrystalline silicone, a pet film on the surface and a transformation efficiency of over 21%. It is equipped with a charging cable of 13.2FT/4m long; -20 ℃ ~ 60 ℃ with operating temperature. Sun Panel Size 7.5 Inch 6.7 inch 0.56 inch .4. [Features and Technology] This solar charging panel helps your door bell camera to charge the battery completely and always charge the battery on sunny days; The shell material is suitable for ABS+PC, which makes it more durable and abrasion resistant; IP66 waterproof, wind, rain and storms; The solar charging panel is equipped with 360 ° rotation and 90 ° adjustable wall assembly bracket, which allows you to position the panel for maximum sunlight. [Easy to install] Place three screws to attach the bracket; Secure the solar panel on parenthesis; Set the direction of the panel by rotating the stem on the bracket to maximize exposure to sunlight; 13.2FT/4m long charging cable (Included) Using .6 connect the panel to the camera. [Packaging List] 13.2FT/4M Charger Cable 1 x Solar Panel , 1 x Paratter , 3 x Screws , 1 x Instructions, .7. [Attention] The red line of the solar panel is a positive pole and the black line is a negative pole, please make sure you connect the positive pole to the positive pole and the negative pole to the negative pole. Our products are FCC, CE, ROHS certified and also maintenance s for 12 months from the date of purchase. If you have any pre-s and after-s questions, please us on time, we will provide 7x24 hours e-mail , we are happy to help you solve any problem. Thanks!