Motorola Solutions makes the scanners, called RS507 ring imagers, which use cameras to take images of one- and two-dimensional barcodes stuck to packages. The destination data on the barcode is transmitted to a small Motorola terminal (model WT4090) worn on a worker's wrist or hip, then transmitted via Wi-Fi to a data center in the UPS facility. From there, the tracking data is available to customers over the Internet.

UPS began deploying the new technology in 2011 and expects to finish the rollout by the end of 2013, Motorola officials said.

Currently, there are 28,000 ring imagers and wearable terminals deployed at 480 UPS sorting facilities, a number that will eventually reach about 38,000 ring imagers and terminal devices in 1,383 locations.

The ring imager is actually worn on two fingers of either hand of a worker, and has the ability to scan a barcode without the need to focus a scanning gun or to pull a trigger common in older scanning technology. Each time a barcode is read, the system verifies that the package is loaded onto the proper trailer or container used in air travel.

Employees can sort packages faster with the system, and the ring imager was developed to be more comfortable for workers to use during a full day, said Jerry McNerney, director of enterprise marketing for Motorola Solutions. Juan Perez, UPS vice president of information systems, said in a statement that the Motorola ring scanners were also picked because they are rugged and long-lasting.