One of the most popular promotional swag items: Sensor Light with Magnet
This easy to use sensor light can attach to metal surfaces with a magnet or can be mounted to other surfaces with the adhesive tabs that are included. The light has an on/off button and when on is activated by motion with in 2 meters. The light will shut off automatically after 20 seconds of no detected motion. 2 piece CR2032 batteries included and installed.