This is a dedicated listing. If someone else purchases it, only the "Mushiking: King of the Beetles" software will be shipped. New batteries will be installed and shipped after purchase. This is a set of 3. The battery can be replaced using the socket method. I have confirmed that it starts up, the solar sensor works, and the clock runs with the battery installed. The lid can be opened with a Phillips head screwdriver, so you can replace the battery yourself with a CR1616 when it runs out.