Please note that this model is being phased out by Owlet. Per their website "Beginning in August 2024, new users will not be able to register a Smart Sock 2 in the Owlet Care App, and by early 2025, the Owlet Care App will no longer support Smart Sock 2 for any user." Item works via the base sensor colors; it just cannot be registered via the app. Includes 2 socks, USB cable, charging adapter, base station, sensor, and box. Does not include Size 2 sock. Shows signs of wear.