The Crimestopper sp-102 is the start of our deluxe Universal security system with keyless entry. The system includes 2 small 4 button remotes with up to 500 ft. OF range. It also includes a Dual stage shock sensor, siren and starter Kill Output. This system allows you to arm/lock, disarm/unlock, release the Trunk as well as do all of these functions Without audible alerts with silent mode.