Super heterodyne, Varactor-Tuned VCO Scanning Frequency Discriminator Digital Signal Processing (DSP) GPS Receiver SiRFstar Laser Detection Quantum Limited Video Receiver Multiple Laser Sensor DiodesDisplay Type 280 LED Alphanumeric Bar Graph or Tech Display 5 Levels of Brightness, plus Full Dark ModePower Requirement 12VDC, Negative GroundProgrammable Features Power-On Indication Voice Alerts Power-On Sequence Signal Strength Meter AutoMute City Mode Sensitivity Radar/Laser Bands Sensitivity Control AutoScan , Highway & AutoNoX Auto Calibration Circuitry VG2 ImmunityDimensions (Inches) 1.40H x 2.90W x 5.35L