Crime Stopper RS-1304DP Remote Vehicle Engine Starter and Keyless Entry System Remote keyless entry/vehicle engine starter for unlocking car doors and warming up the motor Data port technology plugs directly into car's data-linking modules (no hardwiring required) Programmable ultra-smart tachless, tach reference, and preset starter cranking engine sensing modes Programmable horn chirp for lock/unlock, remote start, or trunk pop; remote trunk pop and dome light functions Open hood safety feature keeps car from starting when hood is open; includes pair of 4-button transmitters