The Get Started Kit contains (4) Alerta Patches and (1) Wedge receiver. The Patch is worn on the upper back of the individual being monitored, and is waterproof and comfortable. The Wedge has an audible alarm that notifies a caregiver instantly if a loved one wanders away from the safe zone day or night. After 7 days, the Wedge notifies the caregiver to replace the Patch with a new one. Follow the instructions included in your Get Started Kit and place the new Patch in an adjacent location to reduce skin irritation.