Clear, fast and accurate pressure measurements for all your system applicationsRefrigerantR-404A, R-407C, R-407F, R-408A, R-410A, R-417A, R-427A, R-444B, R-448A, R-449A, R-452A, R-507, R-600, R-1234YF, R1270•Backlit 3-1/8" LCD meters provide easy-to-read, accurate system pressure readings•The replaceable pressure gauges are designed for a maximum pressure of 800 psi so you do not have to worry about overpressure.•Pre-programmed with the 21 most common refrigerants•Unit (pressure): psi / bar / MPa / kg / cm2/ kPa•Automatic shutdown: 10 minutes•Zero pressure function•Power supply: Battery CR123A (3.0 V, 1400 mAh)•Battery life: 2 years continuous operation without backlight