Continuing the legacy of the beloved UPS-II and UPS-III models, and with a market leading accuracy of 0.01% of reading, this rugged and ultra-compact device is designed for one-handed operation, making it incredibly convenient for fieldwork. Its small size allows it to fit comfortably in the top pocket of an overall. Ideal for instrument maintenance, it features an easy-to-read display and user-friendly, time-saving functions such as step, span, and valve check.