Monitor Critical Systems. This Suction Cup Windshield Mount makes reading your X4 Tuners "Real-Time Gauges" and live "Data Logging" info much easier, by placing your Tuner where you can see it without blocking your view of the road. This mount safely and securely attaches your X4/7015 Tuner to your windshield with its industrial strength suction cup. This Suction Cup Windshield Mount is specifically designed to be used with the SCT X4.