"Rapid Receiving Retrieval." SoundTag isn't a package carrier but rather a tracking system that you can use in conjunction with your carrier of choice. SoundTag's patented, innovative tracking system involves a handheld device and small tracking tools placed inside a shipment that interact with one another. The system documents the progress of a shipment online as well, so when the SoundTag-tracked packages arrive in your warehouse, you receive an email. The handheld device also receives information about the shipment which, when activated, will cause the tracking insert to emit a sound from inside the box, thus making it quick and easy to find. SoundTag is most useful in busy business situations where hundreds of boxes come and go daily. The package inserts get recycled. This is the company headquarters.