Check the listing for details. Xpresskit 508D Field Disturbance Sensor Dual Zone. Condition: Open box. Listed at 74.39 USD. What's in the boxDual zone motion sensor 4-pin harness Instructions card About this itemWritten by Crutchfield's Gabrielle Thorndyke Get more out of your Python or Viper security system with XpressKit accessories. These handy add-ons let you incorporate luxury, security and convenience features into your vehicle. The 508D Double-Guard proximity sensor triggers your alarm when a high-density object, like a hand or a tool, enters the cabin of your vehicle. You can set this sensitive dual-zone sensor to trigger a chirp when someone enters a warning zone just outside your vehicle, then to trigger a full alarm response when the second inner zone is violated. Youll enjoy an extra measure of protection when your alarm is armed. Python recommends the 508D sensor to protect convertibles. You can set the sensor to chirp when somebody touches the top, and to trigger the alarm when somebody enters the vehicle with the top down. Warranty: 1 year.