The USB People Counting System’s infrared technology offers a reliable user-friendly and affordable pedestrian counter The transmitter unit transmits 2 infrared beams to the receiver unit When someone passes between the 2 units and breaks the infrared beams the count value increases by one This People Counter is direction sensitive and the in and out count values will be displayed separately via our software application or an Excel spreadsheet There is a 2 Year from Manufacturing Defects Contact Manufacturer directly ALL-TAG for questions product support installation assistance at info@all-tag