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

Attached to 2 Subaru Foresters. Very easy to install. Just check the gap under the plastic bumper, you need at least 3/4 inch space for installation. I installed two units, both had faulty hi/low volume controls. They only worked in the hi position. I had them replaced, no problem unless you place the ECU in a hard-to-reach spot. Make sure to mount the sensors as high on the bumper as possible, otherwise you will get beeps when reversing on slight inclines. This can be annoying! For the money this is a good product.