Viper DS4 is a remote start system that features FREE Bluetooth vehicle control and vehicle status with the Viper SmartStart mobile app. Remotely start, lock, or unlock your vehicle from your smartphone within range up to 150 feet*. Does not require a Viper SmartStart Service Plan.

Viper DS4 is four key mobile technologies integrated into one single device! Viper DS4 equips you to remotely start your vehicle to warm or cool its interior ahead of travel before you even get in! It protects your vehicle through a siren security system. An interface is included, no additional purchase required. And finally, leading Bluetooth Smart technology makes your smartphone a powerful extension of your vehicle. With a Viper SmartStart Pro or Viper Connect, extend the range of use beyond Bluetooth through a cellular network, connecting you to your vehicle from nearly anywhere in the world!**