Radar Receiver / Detector Type: Superheterodyne, Varactor-Tuned VCO, Scanning Frequency Discriminator, Digital Signal Processing (DSP) Laser Detection: Quantum Limited Video Receiver, Multiple Laser Sensor Diodes GPS Receiver: SiRFstar IV Variable-Speed Radar Performance, AutoLearn Feature Safety Camera Database (Pre-loaded with thousands of safety camera locations, including red light and fixed position speed cameras, located throughout North America).