Self-stick detectors indicate possible shock damage to packages during shipment. Attaches easily to the outside of products or packaging. Warning labels (included) give clear instructions for the receiver. Available in 6 different G-ranges; the higher the G-force, the greater the impact is needed to activate. Resettable indicators are great for items that are frequently shipped back and forth - just reset (up to 50 times) with the push of a pin!