Shock and vibration detector with magnetic contact via unidirectional radio, frequency 868 MHz. The Knock and Vibration Detector with Wireless Magnetic Contact combines a shock detector and a magnetic door / window contact detector in a single device for indoor applications. The detector uses an advanced digital microprocessor to analyze the vibration signal received from the piezoelectric sensor. It also includes a magnetic contact for protection against the opening of doors and windows and against any attempt to sabotage the detector using powerful magnets. CR123 3V lithium battery included. Compatible with RISCO unidirectional and bidirectional wireless systems.