Welch Allyn 420 Series 42NOB Spot Vital Signs units. These units are ideal for fast and accurate spot-checks of vital signs, including blood pressure. The devices are of the unit type and are suitable for use in business and industrial settings, as well as healthcare, lab and dental applications. They come complete with control numbers and are modelled with the latest technology to ensure optimal performance.. units tested/working also sanitized. Unit only comes with what is pictured.