{"id": "fm231", "sku": "FM231", "mpn": "FM231", "name": "Linear FM231 Wireless Driveway Alarm", "brand": {"name": "Linear"}, "manufacturer": "Linear", "description": "Monitor vehicles with the FM231 Wireless Driveway Alarm featuring a 400 ft range, vehicle-only detection, and expandable sensor compatibility.", "category": "Vehicle Sensor", "product_type": "simple", "url": "https://www.surveillance-video.com/security-fm231.html", "canonical_url": "https://www.surveillance-video.com/security-fm231.html", "image": {"url": "https://www.surveillance-video.com/media/catalog/product/f/m/fm231.jpg", "alt": "Linear FM231 Wireless Driveway Alarm"}, "price": {"amount": 91, "currency": "USD"}, "availability": "https://schema.org/InStock", "in_stock": true, "inventory_quantity": 4950, "condition": "https://schema.org/NewCondition", "availability_note": "Usually ships within 3-5 business days", "specs": {"range": "400 ft.", "power_source": "Requires 2 AA batteries (not included)", "detection_radius": "3-12 ft.", "sensor_type": "Electromagnetic motion sensor", "false_alarm_prevention": "Only detects vehicles", "indoor_alert_mechanism": "Wireless chime from base station", "compatibility": "Expandable with FM231-R and FM140"}, "highlights": ["Instantly alerts you when someone pulls into or out of your driveway", "The outdoor electromagnetic sensor only detects vehicles; no false alarms due to animals, children, etc.", "Easy-to-install Electromagnetic Sensor Wand is buried next to your driveway", "Ideal for home and business", "Low battery indicator on both the Indoor receiver and transmitter"], "documents": [], "reviews": {"review_count": 0}, "seller": {"name": "Surveillance-Video.com", "url": "https://www.surveillance-video.com", "phone": "800-955-5201"}, "schema_org": {"@context": "https://schema.org", "@type": "Product", "name": "Linear FM231 Wireless Driveway Alarm", "sku": "FM231", "mpn": "FM231", "brand": {"@type": "Brand", "name": "Linear"}, "image": "https://www.surveillance-video.com/media/catalog/product/f/m/fm231.jpg", "description": "Monitor vehicles with the FM231 Wireless Driveway Alarm featuring a 400 ft range, vehicle-only detection, and expandable sensor compatibility.", "offers": {"@type": "Offer", "url": "https://www.surveillance-video.com/security-fm231.html", "price": 91, "priceCurrency": "USD", "availability": "https://schema.org/InStock", "itemCondition": "https://schema.org/NewCondition", "seller": {"@type": "Organization", "name": "Surveillance-Video.com"}}}, "updated_at": "2026-06-02T16:16:34Z", "_meta": {"cached": false, "response_time_ms": 1134, "timestamp": "2026-06-20T02:34:21Z", "api_version": "2.0"}}