The Driven Designs GA-25 Pool Patrol Gate Alarm with Transmitter sounds an alarm before a child or an intruder has entered the pool area. It is a self contained unit with a local sounder, and mounts to any door/gate/fence including all hardware. For double protection, this model also transmits to the Pool Patrol remote receiver (available with the PA-30 Pool Patrol kit) up to a distance of approximately 200 feet. It activates through a magnetic sensor, and no pass code is needed. It is equipped with a reset button to allow a six second pass through without sounding the alarm. The Pool Patrol Gate Alarm is quality constructed and water resistant for long usage. The alarm comes complete with all the necessary mounting hardware. It is battery powered, uses one 9 volt alkaline battery (battery not included).