Owlet Monitor Duo-3rd Generation Sock Tracks heart rate, oxygen level, sleep data, high def video with night vision, sound and motion notifications, 2 way audio, room temperature sensor, viewable from anywhere with the Owlet app. Includes: Smart Sock Sensor *3 socks Base Station Camera with Magnetic Base Wall Mounting Kit *includes 3 of the 4 socks. 1 <12 pounds (Left) 2 12-30 pounds (Right and Left) Some of the socks are showing signs of wear-visible in last photo. Replacement socks can be purchased on Amazon for fairly inexpensively. Wall mounting kit was never used-all those pieces are brand new.