The Vahlkamp wanderguard is exclusively aimed at protecting demented and mentally disordered patients. Dementia is generally referred to as a lack of cognitive, emotional and social skills that lead to a deterioration of social and professional functions. The antenna of the Wander Detection transmits a low-frequency signal. The moment the low-frequency signal is received by the transponder, it will send a high-frequency signal to the transmitting unit. The transmitting unit then activates the LED, the internal buzzer and a relay with potential free contact, which activates the external signaling.