The innovative SD-304 PG2 wireless shock detector provides perimeter protection for residential and commercial premises. It provides early warning of an attempted intrusion by sensing forced entry before a burglar actually enters the property. This potentially reduces the damage and losses to a property as a result of a break in and provides home and business owners with enhanced security. The SD-304 PG2 fits most windows and doors including those made from wood, metal and PVC. It can also be used on walls and roofs.