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Viper 4105V Entry Level 1-Way Remote Start/Keyless Entry System Start your engine from up to a quarter of a mile away with this entry level Viper’s Model 4105V remote start system. This system comes with two 4-button remotes and several features such as keyless entry and SmartStart compatibility. With SmartStart you can use your smartphone to pre-warm your car’s cabin in the winter pre-cool it in the summer lock and unlock your doors arm and disarm your vehicle’s security system open your trunk and even find your car in a parking lot all using your smartphone. 2 4-button 1-Way Up to 1/4 Mile Range New Viper 4105V features Auxiliary channel Horn Honk Viper SmartStart compatible Includes two 1-Way remotes Separate ESP2 and D2D ports Onboard remote start relays ESP2 is Viper’s exclusive serial communications protocol that allows extra ultra-security high-speed communication between systems and enables many of Viper’s key features. Viper recently made a significant performance upgrade to the RF receiver section of many of our award-winning security and remote start systems. The new XR+ Extreme Range superheterodyne receiver has an improved sensitivity specification of between 3 dB and 6 DB which equates to a measurable range increase on the order of 15 percent. It offers improved image rejection for certain types of RF interference resulting in improved reliability. Start control or locate your car from virtually anywhere with your smartphone. You can add a Viper SmartStart module to any compatible Viper remote start or security with remote start system to make your system SmartStart ready. By adding a VSM350 module your system will also be ready for SmartStart GPS.