This is the Thinkware TWA-RDR radar module. This sensor is compatible with the following camera models:Thinkware U1000 Thinkware U1000PRO Thinkware ARC900Thinkware ARC700Thinkware Q1000Thinkware X1000 This sensor is used to enable Energy Saving Parking mode on the compatible Thinkware dash cameras. Pair the Radar Module with a dash cam to extend its parking surveillance duration while reducing power consumption when set to Energy Saving Mode 2.0. The Radar will detect motion and allow the dash cam to prepare to save an event clip. If an impact is detected, a 20 second video (10 seconds before and 10 seconds after the impact) is saved in a dedicated folder on the MicroSD card. When no impacts are detected, the dash cam does not save the footage and resumes Energy Saving Mode 2.0.