About this item STAY AWARE - Plug-In Alert flashes & sounds alarm when sensors are triggered. Always know when your door, window or cabinet is opened. BATTERY FREE COMFORT - Plug-In Alert never needs a new battery. Up to 250 ft. / 75m range. Will not startle care recipients, visitors or customers. COMPLETE, SIMPLE & EXPANDABLE - Part of the smpl Monitoring Alert System. Easily add more sensors, bells or alerts to your home or business. See our Store Page for add-ons. Fully compatible with future smpl devices. WORKS OUT OF THE BOX - No tools required, set up in minutes. Sensors come pre-installed with double sided tape. LIVE TECHNICAL SUPPORT - Speak to a live person at our support center if you need assistance. Alerts Plug-in Alerts Chime, Connect Alerts System, Elderly Assistance, Caregiver Paging System, Senior & Kids Safety, Security, Live Technical Support (Double Door Kit) Office Products › Office Electronics › Telephones & Accessories › Pagers Office Products › Office Electronics › Telephones & Accessories › Pagers Office Products › Office Electronics › Telephones & Accessories › Pagers Office Products › Office Electronics › Telephones & Accessories › Pagers