Sentry Technology Corporation designs, manufactures, markets and services traveling closed-circuit television (CCTV) technology products, including VideoRailway and SmartTrack. The Company's traveling video systems transmit images from a pan-tilt-zooms (PTZ) camera mounted on a carriage that travels along a rail attached to the ceiling of any facility. The camera provides unobstructed views of people and processes. Its systems are operated using a joystick console, a cell phone or tablet, and over the Internet. VideoRailway features a single high definition/Internet protocol (HD/IP) video camera that travels along straight and curved rail segments that can be configured in a continuous loop. The system is backwards compatible with analogue designs while also interfacing with the latest digital networks. SmartTrack is a traveling carriage with two fully programmable PTZ's. SmartTrack systems serve retailers, distribution hubs, couriers and public transportation facilities.