These detectors are designed to be attached to the packages you are shipping as a warning about careful handling and to detect mishandling. Each detector is individually serialized for traceability. The detectors being offered here detect a 75G impact and, according to the manufacturer, are designed to protect packages up 50lbs. The detector turns red if a high impact is registered. These are available from the manufacturer in different styles and G force ratings. Please ensure these are appropriate for your application before purchasing.Drop Detectors