For hydraulic, oil pressure, water pressure, air pressure measuring, for media which is not corrosive to stainless steel wetted parts - Batteries status display - Process connection : 1/4"NPT male, lower mount - Overload Capacity : 150%Accuracy : 0.25%Input Voltage : 3.0V (two 1 ...For hydraulic, oil pressure, water pressure, air pressure measuring, for media which is not corrosive to stainless steel wetted parts - Batteries status display - Process connection : 1/4"NPT male, lower mount - Overload Capacity : 150%Accuracy : 0.25%Input Voltage : 3.0V (two 1.5V AAA batteries)Working temperature : -4 to 140 deg F/-20 to 60 deg CAmbient temperature : 140 deg F/60 deg C maximum - Case : 304 stainless steel - Wetted parts : 316 stainless steel - IP Class : IP54How to operate :Button Description :Power button : Long Press to Start up/Shut down - UNIT button : Short Press the button, cyclic switching the pressure unit - ZERO button : Press Zero button for 5 seconds, Calibration zero - LIGHT button : Press Light button start up/shut down backlight - Package Content:1 x Digital Pressure Gauge,1 x Operation Manual. "Measureman" products are selected and designed by professional engineers.