Security equipment and supplies help protect commercial and industrial facilities and the people inside them. Access barriers and crowd-control products direct traffic and restrict access to certain areas of a facility. Two-way radios, police scanners, walkie talkies, and vessel automatic identification systems help workers communicate with and listen to each other around the job site. Locks and safes keep valuables secure from theft and damage. Security alarms and warning alert personnel of emergencies or prevent theft and vandalism of a company's property. Video surveillance equipment includes cameras and accessory items placed in strategic areas for recording evidence of theft, vandalism, or other crimes.