Datalogs up to 10,000 readings with a user programmable sample rate Manual and Programmable start modes Status Indication via Red/Yellow LED and Green LED USB interface for easy set-up and data download Selectable Atmospheric Pressure Units: psi, hPa, kPa, and bar Selectable data sampling rate from 1 minute to 18 hours User-programmable Min/Max alarm thresholds (Specifications) Air Pressure 13.7 to 15.2ps Memory 10,000 points Temperature -40 to 158"F to 40 to 70"C Humidity 0 to 100%RH Resolution 0.1"F/"C Datalogging interval 1 minute to 18 hours Weight 1oz (20g) Dimensions 5.1 x 1.1 x 0.9in (130 x 30 x 25mm) (Items Included) 3.6V Lithium battery mounting bracket Windows" 98, 2000, XP, Vista compatible analysis software