Overview_x000d_ 3-1/8†backlit lcd gauges provide easy-to-read accurate measurements for system pressures. This gauge is capable of handling maximum pressures of 800 psi, so there are no worries about over-pressurizing. Pre-programmed with 21 of themon refrigerants, the yellow jacket digital gauges will provide clear, swift and accurate pressure measurements for all your system applications. _x000d_ _x000d_ _x000d_ gauge specifications_x000d_ _x000d_ †pressure range: -14.7 ~ 800 psi (-1 ~ 54.4 bar)_x000d_ †unit (pressure): psi / bar / mpa / kg/cm2 / kpa_x000d_ †working temperature: 14℉ ~ 140℉ (-10â„Æ' ~ 60â„Æ')_x000d_ †pressure accuracy: â±0.5% f. S @71.6~82.4℉ (@22~28â„Æ')_x000d_ †unit (temperature): ℉/â„Æ'_x000d_ †working humidity: 35~85%_x000d_ †sampling rate = 1.2 sec max. _x000d_ †auto-off: 10 minutes_x000d_ †zero pressure function_x000d_ †power supply: battery cr123a (3.0v, 1400mah)_x000d_ †battery life: 2 years for continuous operation_x000d_ without backlight_x000d_ †warranty: one year_x000d_ _x000d_ refrigerants_x000d_ _x000d_ r-22, r-23, r-32, r-124,_x000d_ _x000d_ r-134a, r-290, r-404a, _x000d_ _x000d_ r-407c, r-407f, r-408a, _x000d_ _x000d_ r-410a, r-417a, r-427a, _x000d_ _x000d_ r-444b, r-448a, r-449a, _x000d_ _x000d_ r-452a, r-507, r-600a, _x000d_ _x000d_ r-1234yf, r1270_x000d_ _x000d_