Start, Control, and Locate Your Car From Virtually Anywhere. Viper SmartStart Pro is the fastest connected car solution available. Location and speed tracking enable monitoring where the car is for appropriate intervention. The keyless entry feature lets you open your car without fumbling through your pockets for keys. This Viper SmartStart Pro GPS module is optimized for use with Viper DS4/DS4+ systems. | Viper | | SmartStart Pro 2-Way, 4G Smartphone Compatible, GPS Module | Black | Best Buy