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Radio frequency is a form of wireless communications used to relay information via radio frequency waves from a scanner to a base station, which is then linked to a main computer. Scanners can be mounted to forklifts, held by hand, or worn to allow for quick and easy picking. The scanner directs the employee to the correct picking location. The employee picks the product then scans the barcode, which leads to the system automatically updating the picked items in the warehouse management system (WMS).