The Vision Garage Sensor is a Z-Wave compatible sensor that detects if a garage door is vertical (closed) or horizontal (open), making it ideal for added security of external garages. The detector can have an external switch connected to it and includes an internal tamper switch. It is easily fitted to any garage door using screws or double-sided tape. Battery replacement is simple and the detector even tells you when they need replacing by flashing its LED and sending an alert to the central controller.
– See more at: http://www.visionsecurity.com.tw/index.php?option=product&lang=en&task=pageinfo&id=48&belongid=189&index=0