Infrared Counter (Case Dimension: 7x17 cm) It is produced to count living and non-living entities passing through doors spaced up to 2 meters apart. The Instrument Panel consists of one receiver and one transmitter. The model in the ad is wired and 4 digit. Instrument Panel Case Dimension: 7x17cm Letter Height: 38mm Our products are our own production and are guaranteed against manufacturing defects for 2 years.