D3D Wireless Scroll Steel Door -SDM100 Wireless Sensor Security System

This is the perimeter protection for the premises. The magnetic contact is usually installed in exterior opening doors and windows that are reachable from the ground (or from another part of a building which is accessible from the ground - such as a garage)Note: Please note this listing is for the D3D Shutter Sensor Wired. This D3D Shutter Sensor Wired works with D3D Home Security System, which need to be bought separately.Features:High Quality Alloy plating shell, stainless steel pipe threadWireless Metal Rolling Garage Door Magnetic Contact Sensors Detectors.Useful for roller shutter/rolling doorTop quality product at an amazingly low priceIdeal for locking up your garage.