Cobra Electronics SPX 7800BT Maximum Performance Radar/Laser/Camera Detector (Certified Refurbished) This Certified Refurbished product is tested & certified by Cobra to work like-new. The product includes all accessories listed below, and is backed by a 90-day warranty. Low-microwave-loss circuitry utilizing gold-plated circuit boards Use of flip-chip Mixer/Multiplier diodes in packages that were once unattainable First Local Oscillator Transistor (Super-low-noise, high-mobility J-FET) that has been chosen to optimize signal gain, output power, and low noise characteristics over its frequency range Ultra-low-noise, signal amplifiers that once were affordable only to military systems