Max. / min. / avg. recording, relative time stamp and data hold facilitate data recording. Zero function for offset correction or measurement. Large, backlit LCD. Built-in USB port. Auto power off preserves battery life. Windows® compatible software with cable, two connection hoses, 100-240V switching AC adaptor, hard carrying case and 9V battery included. Choose from 2 psi (No. 155753) and 5 psi (No. 155754).