Review on Frostory Car Reverse Backup Parking Sensor Radar System - Waterproof Sensors, Detection Distance: 30~150CM, Buzzer Beeps - 4 Packs X60D (Silver) by Demarco Vonk

I have been buying/using this type of redundant sensors for many years. I love her. I put them on my daughter's car and mine. No problem, they ALWAYS work and work perfectly. This time I matched the gray ones with my gray sprout. Initially, the sensor's colors looked brighter, but after installation, they matched perfectly. They work great too. I only used 3, 1 on each end and 1 in the middle. The speaker/buzzer is located at the rear and is loud enough to be heard above normal radio listening levels when reversing. The last solid signal means you are approximately 2.5 feet from the detected object. I would prefer something closer, like 12"-18", but what are you going to do? I can still recommend it for the price. VERY easy installation ESPECIALLY if you already have an aftermarket backup camera up and running. Would buy again. I'm glad I got a color this time that matches the black I usually get. Much cooler. The perfect color for my 2012 Ford Escape Sterling Gray!