The GRI POOL ALARM uses a microprocessor to monitor the CLOSED LOOP magnetic reed switch(es), shunt/cancel button, and supply voltage, and to provide the timing options. The POOL ALARM is set to alarm instantly if the protected door is opened before pressing the shunt/cancel button. Model DPARM-D is set to an initial seven second delay. In which case, alarm will wait 7 seconds upon door opening before alarming. In all cases, depressing the shunt/cancel button will provide a maximum 15 second window of alarm deactivation and automatically reset upon expiration.