PETKIT P2 Smart Pet Activity Tracking Device monitors movement, emotion, health conditions as well as short and deep sleep intervals. The application is available for download for both Android and iOS devices. Simply download the PETKIT Application and then select the FIT sub-application. Available in 5 Colors and weighing in at only 1 ounce, the PETKIT P2 is composed of a modern and durable circular water-resistant and micron sandblasted aluminum outershell. The connector piece is dual rubberized and secures the device onto all collars and harnesses.