Stilla offers a pocket-sized motion-sensing device that attaches to personal belongings, creating a security circle. It utilizes an algorithm to filter out non-threatening movements and sends alerts and notifications via a smartphone app when belongings are touched or moved. The device features a small speaker, Bluetooth transmitter, accelerator, and a light, all powered by a replaceable watch battery. Users can adjust the device's sensitivity manually through the mobile app, providing a flexible and customizable security solution for users on the go.