This solar powered red dot will charge in a well-lit room or during a sunny day hunting. There is no need to plug it in which means you’ll never have to worry about forgetting to charge it, but you can always use an AA battery if needed. It is made with heavy ruby coated glass and a screw in filter that will eliminate the red dot/ruby lens signature. There’s a quick connect mount included for easy installation. It has a large lens for viewing, but still only weighs 1lb.