The Portable Ping Device is the brainchild of Warehouse whiz kid Claudia Donovan.
The Portable Ping Device is basically a smaller version of the Warehouse Artifact System. When an Artifact is located and a "Ping" is sent to the Computer System in the Warehouse, it also sends a notification to each device. Also like the Warehouse System, these devices can be used to search the existing database for artifacts.
Artie and Claudia each carry one of these devices.